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Kalata M, Williams CA, Verbruggen FF, De Ste Croix M, Lehnert M, Zahalka F, Maly T. Strength and jumping performance in youth athletes: do sport specialization and age categories affect strength asymmetry? Res Sports Med 2025; 33:334-351. [PMID: 39955633 DOI: 10.1080/15438627.2025.2465544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2024] [Accepted: 02/04/2025] [Indexed: 02/17/2025]
Abstract
METHODS A total of 181 young male athletes were recruited and categorized according to sport specialization (soccer or athletics) and age categories (U15, U17 or U19). Isokinetic strength was measured as peak muscle torque (PT), normalized to body mass, for the knee extensors (PTKE) and knee flexors (PTKF) during concentric muscle contraction at three angular velocities (60°s-1. 180°s-1. 300°s-1). Vertical jump performance was measured during a countermovement jump with arms fixed (CMJ) and a squat jump (SJ). RESULTS Significantly higher values of bilateral asymmetry (BA) of PTKF for angular velocity 60°s-1 and 180°s-1 were found in the athletics group compared to the soccer group in the U17 category (14.40% to 16.02% vs 9.07% to 10.45%). Significantly higher values of BA for angular velocity 300°s-1 for both PTKE and PTKF were found in the U15 compared to U19 category. Significantly higher values of H:Q ratio at all angular velocity except for the non-dominant leg in the highest angular velocity in soccer compared to the athletes in the U17 category were found. Soccer players exhibited significantly higher values of PTKF compared to those in athletics and jump height in the U17 category. CONCLUSION Soccer players displayed increased isokinetic strength and more balanced BA compared to the athletics group. Physiotherapists and strength coaches should focus on younger age groups, especially U15, due to the higher incidence of BA and lower relative strength regardless of specialization.
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Affiliation(s)
- Maros Kalata
- Sport Research Centre, Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
| | - Craig Anthony Williams
- Children's Health and Exercise Research Centre, Faculty of Health and Life Sciences, University of Exeter, Exeter, UK
| | - Ferdia Fallon Verbruggen
- Sport Research Centre, Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
| | - Mark De Ste Croix
- School of Education and Science, University of Gloucestershire, Gloucester, UK
| | - Michal Lehnert
- Department of Sport, Faculty of Physical Culture, Palacký University Olomouc, Olomouc, Czech Republic
| | - Frantisek Zahalka
- Sport Research Centre, Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
| | - Tomas Maly
- Sport Research Centre, Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
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Dauty M, Louguet B, Menu P, Grondin J, Crenn V, Daley P, Fouasson-Chailloux A. Enlightenment on Knee Flexors Strength Loss in Cases of Posterior Knee Pain After Anterior Cruciate Ligament Reconstruction. J Sport Rehabil 2024; 33:317-324. [PMID: 38684207 DOI: 10.1123/jsr.2023-0346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 03/01/2024] [Accepted: 03/12/2024] [Indexed: 05/02/2024]
Abstract
CONTEXT The persistence and the recurrence of posterior medial knee pain (PKP) after anterior cruciate ligament reconstruction (ACLR) using hamstring tendon graft are often overlooked during rehabilitation. DESIGN Cross-sectional observational study. METHODS The study aimed (1) to evaluate the prevalence of these types of PKP before 4 months post-ACLR, (2) to measure their consequences on the knee flexors strength, and (3) to evaluate the role of the type of ACLR. From a cohort of patients operated on with hamstring tendon procedures, the persistent and the recurrent PKP were sought at 4 months post-ACLR. The evolution of isokinetic muscle strength recovery in PKP subjects was compared with those of nonpainful subjects. The functional deficit was measured at 6/7 months post-ACLR by a hop test. RESULTS Three hundred seventeen subjects (25.8 [6.0] y) were included. At 4 months post-ACLR, 2 populations were identified based on the recurrent onset of PKP (PKP+, n = 40) or the absence of knee pain (PKP-, n = 277). The prevalence of PKP was 8.3%. At the fourth month post-ACLR, the PKP+ group had a higher flexor strength deficit compared with the PKP- group (limb symmetry index at 60°/s: 67.2% [12.4%] vs 84.3% [12.6%]; P < .05). At 6/7 months, the loss of strength persisted (limb symmetry index at 60°/s: 82.3% [13.4%] vs 87.7% [12.8%]; P < .05). The hop test deficit was comparable, and no difference was shown according to the type of graft. CONCLUSIONS Persistent and recurrent PKP during the rehabilitation period were not uncommon and were associated with a worsening of flexors strength loss on the ACLR side.
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Affiliation(s)
- Marc Dauty
- Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes Université, Nantes, France
- Institut Régional de Médecine du Sport (IRMS), Nantes, France
- Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, ONIRIS, Nantes Université, Nantes, France
| | - Bastien Louguet
- Service de Médecine du Sport, CHU Nantes, Nantes Université, Nantes, France
- Institut Régional de Médecine du Sport (IRMS), Nantes, France
| | - Pierre Menu
- Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes Université, Nantes, France
- Institut Régional de Médecine du Sport (IRMS), Nantes, France
- Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, ONIRIS, Nantes Université, Nantes, France
| | - Jérôme Grondin
- Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes Université, Nantes, France
- Institut Régional de Médecine du Sport (IRMS), Nantes, France
| | - Vincent Crenn
- Clinique Chirugicale Othopédique et Traumatiologique, CHU Nantes, Nantes Université, Nantes, France
| | - Pauline Daley
- Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes Université, Nantes, France
- Institut Régional de Médecine du Sport (IRMS), Nantes, France
| | - Alban Fouasson-Chailloux
- Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes Université, Nantes, France
- Institut Régional de Médecine du Sport (IRMS), Nantes, France
- Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, ONIRIS, Nantes Université, Nantes, France
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Dauty M, Combes P, Gernigon M, Menu P, Crenn V, Daley P, Fouasson-Chailloux A. Difference of Knee Strength Recovery Between Revision and Primary ACL Reconstruction. Int J Sports Med 2024; 45:390-398. [PMID: 38267006 DOI: 10.1055/a-2253-0103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2024]
Abstract
Different grafting procedures are available to restore knee stability after revision anterior cruciate ligament (ACL) reconstruction. We compared knee strength recovery between ACL revision surgery and primary reconstruction. One hundred and ten patients with ACL revision surgery were matched with 110 patients with primary reconstruction based on the graft procedure. The isokinetic knee strength had been assessed for the first 9 months post-surgery. Knee laxity, function, and activity score were also evaluated. Limb symmetry index for knee extensor and flexor strength was not different at 4-, 6- and 9-months post-surgery between revision surgery and primary reconstruction. These results depended on ipsilateral or contralateral graft choice. Ipsilateral hamstring tendon (HT) and contralateral bone-patellar-tendon-bone (BPTB) graft procedures were similar for a revision of a BPTB graft failure. Contralateral HT procedure was better than ipsilateral BPTB procedure for a revision of a HT graft failure. The early recovery of isokinetic knee strength after ACL revision surgery regardless of the HT or BPTB procedures, was similar to the recovery after primary ACL reconstruction with the same graft technique. These results apparently depended on a temporary quadriceps arthrogenic muscle inhibition and on a persistent donor site morbidity, concerning the new and the previous grafts, respectively.
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Affiliation(s)
- Marc Dauty
- Service de Médecine Physique et Réadapatation Locomotrice et Respiratoire, CHU Nantes, Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes, France
- Institut Régional de Médecine du Sport, CHU Nantes, Nantes, France
| | - Philippe Combes
- Service de Médecine Physique et Réadapatation Locomotrice et Respiratoire, CHU Nantes, Nantes, France
| | - Marie Gernigon
- CIAMS, Université Paris-Saclay, Gif-sur-Yvette, France
- CIAMS, Université d'Orléans, Orleans, France
| | - Pierre Menu
- Service de Médecine Physique et Réadapatation Locomotrice et Respiratoire, CHU Nantes, Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes, France
| | - Vincent Crenn
- Clinique Chirurgicale Orthopédique et Traumatologique, CHU Nantes, Nantes, France
| | - Pauline Daley
- Service de Médecine Physique et Réadapatation Locomotrice et Respiratoire, CHU Nantes, Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes, France
| | - Alban Fouasson-Chailloux
- Service de Médecine Physique et Réadapatation Locomotrice et Respiratoire, CHU Nantes, Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes, France
- Institut Régional de Médecine du Sport, CHU Nantes, Nantes, France
- Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, Nantes, France
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Śliwowski R, Paillard T, Bojkowski Ł, Dudziński W, Patek M, Marynowicz J. Intra- and inter-limb strength imbalance and asymmetry in soccer: A comparison of elite senior and junior players. PLoS One 2024; 19:e0302474. [PMID: 38669272 PMCID: PMC11051617 DOI: 10.1371/journal.pone.0302474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 04/04/2024] [Indexed: 04/28/2024] Open
Abstract
Evaluation of muscle strength imbalance can be an important element in optimizing the training process of soccer players. The purpose of the study was to examine isokinetic peak torque (PT) and total work (TW) exerted by both knee extensors (quadriceps or Q) and flexors (hamstrings or H), intra-limb imbalance and the magnitude and direction of inter-limb asymmetry in top elite senior (n = 109) and junior (n = 74) soccer players. An isokinetic dynamometry was used to measure maximum peak torque of quadriceps (PT-Q) and hamstrings (PT-H) at an angular velocity of 60° ·s-1, as well as the total work for extensors (TW-Q) and flexors (TW-H) at an angular velocity of 240° ·s-1 in the dominant (DL) and non-dominant leg (NDL) during concentric muscle contraction. Intra-limb imbalance and inter-limb asymmetries were calculated using a standard equation. Statistical analysis using t-test and Mann-Whitney U-test revealed: (a) no differences (p > 0.05) between groups for PT-Q and PT-H, (b) greater strength levels (p < 0.05) for TW-Q and TW-H of senior players than juniors, and (c) no differences (p > 0.05) between groups for intra-limb imbalance and inter-limb asymmetry. Additionally, Pearson's chi-kwadrat (χ2) analysis showed no differences (p > 0.05) between groups for intra-limb imbalance and inter-limb asymmetry in relation to the 'normative' values accepted in the literature that indicate an increase in the risk of knee injury. This study shows that isokinetic assessment can be an important tool to identify imbalances/asymmetries and to develop strategies to reduce the risk of muscle injury.
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Affiliation(s)
- Robert Śliwowski
- Department of Theory and Methodology of Team Sport Games, Poznan University of Physical Education, Poznan, Poland
| | - Thierry Paillard
- Department of Sport Sciences, University of Pau et des Pays de l’Adour, E2S UPPA, MEPS Laboratory, Tarbes, France
| | - Łukasz Bojkowski
- Department of Psychology, Poznan University of Physical Education, Poznan, Poland
| | - Witold Dudziński
- Rehasport Clinic FIFA Medical Centre of Excellence, Poznan, Poland
| | - Mikołaj Patek
- Department of Theory and Methodology of Team Sport Games, Poznan University of Physical Education, Poznan, Poland
| | - Jakub Marynowicz
- Department of Theory and Methodology of Team Sport Games, Poznan University of Physical Education, Poznan, Poland
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Dauty M, Le Mercier E, Menu P, Grondin J, Hirardot T, Daley P, Fouasson-Chailloux A. Prolonged Physiotherapy after Anterior Cruciate Ligament Reconstruction Does Not Improve Muscular Strength and Function. J Clin Med 2024; 13:2519. [PMID: 38731047 PMCID: PMC11084926 DOI: 10.3390/jcm13092519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 04/03/2024] [Accepted: 04/23/2024] [Indexed: 05/13/2024] Open
Abstract
Background: After the rupture of the anterior cruciate ligament (ACL), surgery is proposed in the case of knee instability or for athletes who want to return to a pivotal and/or contact sport. The current trend is to extend physiotherapy sessions until a patient's return to sport. We aimed to assess the interest in prolonging the physiotherapy sessions up to 4 postoperative months to restore muscle knee strength and function. Methods: From a historical cohort, 470 patients (24.3 ± 8.7 years) were included; 312 (66%) were males. They all had undergone a primary ACL reconstruction with a hamstring procedure. The number of physiotherapy sessions was established at 4 postoperative months. The main study parameters to assess the benefit of prolonged physiotherapy were the isokinetic limb symmetry index (LSI) for the quadriceps and the hamstrings as well as the Lysholm score. Results: At 4 postoperative months, 148 patients (31.4%) still had physiotherapy sessions. This group had performed 49 ± 14 physiotherapy sessions at the time of evaluation compared to 33 ± 9 sessions performed by the group that stopped physiotherapy at 3 months post-ACL reconstruction. The isokinetic knee LSI and the Lysholm score were not different between the two groups. Continued physiotherapy sessions were associated with female gender, previous high sport level, meniscal repair, lateral tenodesis and outpatient rehabilitation at the beginning of the rehabilitation management, while knee pain complications were not associated. Conclusions: No significant correlation was found between the number of physiotherapy sessions and the knee strength LSI or the Lysholm score. Prolonging patient physiotherapy sessions after 3 months post-ACL reconstruction seems ineffective in improving knee strength recovery and function.
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Affiliation(s)
- Marc Dauty
- Physical Medicine and Rehabilitation, Sport Medicine Center, University Hospital of Nantes, CHU Nantes, 44093 Nantes, France; (M.D.); (E.L.M.); (P.M.); (T.H.)
- Institut Régional de Médecine du Sport des Pays de Loire (IRMS), 44093 Nantes, France;
- Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, ONIRIS, Nantes Université, 44042 Nantes, France
| | - Emmanuel Le Mercier
- Physical Medicine and Rehabilitation, Sport Medicine Center, University Hospital of Nantes, CHU Nantes, 44093 Nantes, France; (M.D.); (E.L.M.); (P.M.); (T.H.)
| | - Pierre Menu
- Physical Medicine and Rehabilitation, Sport Medicine Center, University Hospital of Nantes, CHU Nantes, 44093 Nantes, France; (M.D.); (E.L.M.); (P.M.); (T.H.)
- Institut Régional de Médecine du Sport des Pays de Loire (IRMS), 44093 Nantes, France;
- Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, ONIRIS, Nantes Université, 44042 Nantes, France
| | - Jérôme Grondin
- Physical Medicine and Rehabilitation, Sport Medicine Center, University Hospital of Nantes, CHU Nantes, 44093 Nantes, France; (M.D.); (E.L.M.); (P.M.); (T.H.)
- Institut Régional de Médecine du Sport des Pays de Loire (IRMS), 44093 Nantes, France;
| | - Thomas Hirardot
- Physical Medicine and Rehabilitation, Sport Medicine Center, University Hospital of Nantes, CHU Nantes, 44093 Nantes, France; (M.D.); (E.L.M.); (P.M.); (T.H.)
- Institut Régional de Médecine du Sport des Pays de Loire (IRMS), 44093 Nantes, France;
| | - Pauline Daley
- Institut Régional de Médecine du Sport des Pays de Loire (IRMS), 44093 Nantes, France;
| | - Alban Fouasson-Chailloux
- Physical Medicine and Rehabilitation, Sport Medicine Center, University Hospital of Nantes, CHU Nantes, 44093 Nantes, France; (M.D.); (E.L.M.); (P.M.); (T.H.)
- Institut Régional de Médecine du Sport des Pays de Loire (IRMS), 44093 Nantes, France;
- Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, ONIRIS, Nantes Université, 44042 Nantes, France
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Maly T, Hank M, Verbruggen FF, Clarup C, Phillips K, Zahalka F, Mala L, Ford KR. Relationships of lower extremity and trunk asymmetries in elite soccer players. Front Physiol 2024; 15:1343090. [PMID: 38370013 PMCID: PMC10869622 DOI: 10.3389/fphys.2024.1343090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 01/16/2024] [Indexed: 02/20/2024] Open
Abstract
In light of previous research highlighting the prevalence of asymmetries in soccer players and possible links to injury risks, there is a crucial gap in the biomechanical understanding of complex relationships between lower extremity and trunk asymmetries in elite soccer players. The purpose of this study was to investigate the level, relationships, and differences among twelve different parameters of strength, morphological, and neuromuscular asymmetries in elite soccer players. Methods: Elite male soccer players (n = 25, age 21.7 ± 3.9 years) were tested in the following tests: bilateral fluid distribution, hip flexor range of motion, postural stability, isokinetic strength of knee extensors and flexors, isometric lateral trunk rotation strength, eccentric strength of knee flexors, isometric bilateral strength of hip adductors, and vertical ground reaction force in counter-movement jump-free arms, counter-movement jump, squat jump, and drop jump tests. One-way ANOVA, Pearson's coefficient (r), and partial eta squared (η p 2) were used for data analysis. Results: Significant differences in asymmetries were found in elite soccer players (F11,299 = 11.01, p < .01). The magnitude of asymmetry over 10% was in postural stability and drop jump parameters. The lowest magnitudes of asymmetries were in the fluid distribution of the lower limbs and the vertical ground reaction force during the take-off phase in squat jumps. The highest asymmetries between the dominant and non-dominant sides were found in postural stability and drop jump. A total of eleven significant correlations (p < 0.05, r = 0.41-0.63, R2 = 0.17-0.40) were detected between the analyzed asymmetries in elite soccer players. The lateral trunk rotation asymmetries were significantly correlated to vertical ground reaction force asymmetries and knee extensors. Conclusion: Long-term exposure in elite soccer leads to unilateral biomechanical loading that induces abnormal strength and morphological adaptations in favor of the dominant side while linking lower limb and trunk strength asymmetries. By unraveling these complex relationships, we strive to contribute novel methods that could inform targeted training regimens and injury prevention strategies in the elite soccer community. The data should encourage future researchers and coaches to monitor and develop trunk strength linked to lower body kinematics.
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Affiliation(s)
- Tomas Maly
- Sport Research Center, Faculty of Physical Education and Sport, Charles University, Prague, Czechia
- Department of Performance, AC Sparta Praha, Prague, Czechia
| | - Mikulas Hank
- Sport Research Center, Faculty of Physical Education and Sport, Charles University, Prague, Czechia
| | - Ferdia Fallon Verbruggen
- Sport Research Center, Faculty of Physical Education and Sport, Charles University, Prague, Czechia
- Department of Performance, AC Sparta Praha, Prague, Czechia
| | | | - Kirk Phillips
- Department of Performance, AC Sparta Praha, Prague, Czechia
| | - Frantisek Zahalka
- Sport Research Center, Faculty of Physical Education and Sport, Charles University, Prague, Czechia
| | - Lucia Mala
- Sport Research Center, Faculty of Physical Education and Sport, Charles University, Prague, Czechia
| | - Kevin R. Ford
- Department of Physical Therapy, High Point University, High Point, NC, United States
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Zöger M, Nimmerichter A, Baca A, Wirth K. Reproducibility of peak moment for isometric and isokinetic knee extension exercise. BMC Sports Sci Med Rehabil 2023; 15:171. [PMID: 38104113 PMCID: PMC10724990 DOI: 10.1186/s13102-023-00788-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 12/11/2023] [Indexed: 12/19/2023]
Abstract
BACKGROUND Accurate measurements of muscular performance are important for diagnostics, for example during rehabilitation after traumatic injuries but also in competitive sports. For these purposes, dynamometric devices are widely used and considered the gold standard for muscle strength testing. However, few previous studies have tested the reproducibility of peak moment (PM) at velocities close to the maximum device capability, and in general, reproducibility results cannot be transferred to other devices or test protocols. The purpose of this study was to evaluate the reproducibility of PM for different isometric and isokinetic knee extension exercises using the IsoMed 2000. METHODS Thirty subjects volunteered in three repeated test sessions, including isometric knee extension (100° and 140° knee angle) and isokinetic knee extension (30°/s and 400°/s). Statistical analysis for comparison of sessions two and three included paired sample t-test, calculation of intraclass correlation coefficient (ICC) and standard error of measurement (SEM). Additionally, Bland Altman statistics and corresponding plots were created. RESULTS A significant difference between sessions in PM was found for isometric knee extension in one leg (140° left). Reproducibility was high for all conditions with ICC ranging from 0.964 to 0.988 and SEM in the range of 7.6 to 10.5 Nm. Bland Altman statistics revealed a bias between - 7.3 and 0.7 Nm. CONCLUSIONS Reproducibility of PM using the IsoMed 2000 was good after an initial familiarization trial with high values of relative reproducibility. Absolute reproducibility can be interpreted as appropriate for most common practical applications.
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Affiliation(s)
- Manfred Zöger
- Training and Sports Sciences, University of Applied Sciences Wiener Neustadt, Johannes Gutenberg-Straße 3, 2700, Wiener Neustadt, Austria.
- Centre for Sport Science and University Sports, University of Vienna, Auf der Schmelz 6, 1150, Wien, Austria.
- Doctoral School of Pharmaceutical, Nutritional and Sport Sciences, University of Vienna, Josef-Holaubek-Platz 2, 1090, Wien, Austria.
| | - Alfred Nimmerichter
- Training and Sports Sciences, University of Applied Sciences Wiener Neustadt, Johannes Gutenberg-Straße 3, 2700, Wiener Neustadt, Austria
- Centre for Sport Science and University Sports, University of Vienna, Auf der Schmelz 6, 1150, Wien, Austria
| | - Arnold Baca
- Centre for Sport Science and University Sports, University of Vienna, Auf der Schmelz 6, 1150, Wien, Austria
| | - Klaus Wirth
- Training and Sports Sciences, University of Applied Sciences Wiener Neustadt, Johannes Gutenberg-Straße 3, 2700, Wiener Neustadt, Austria
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Maestroni L, Turner A, Papadopoulos K, Cohen D, Sideris V, Graham-Smith P, Read P. Comparison of Strength and Power Characteristics Before ACL Rupture and at the End of Rehabilitation Before Return to Sport in Professional Soccer Players. Sports Health 2023; 15:814-823. [PMID: 37203795 PMCID: PMC10606975 DOI: 10.1177/19417381231171566] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023] Open
Abstract
BACKGROUND Strength and power is often reduced on the involved versus contralateral limb and healthy controls after anterior cruciate ligament (ACL) reconstruction, but no study has compared with preinjury values at the time of return to sport (RTS). HYPOTHESIS Divergent recovery patterns in strength and power characteristics will be present at RTS relative to preinjury baseline data and healthy matched controls. STUDY DESIGN Cohort study. LEVEL OF EVIDENCE Level 3. METHODS Isokinetic strength tests, bilateral and single-leg countermovement jumps (CMJ; SLCMJ) were measured before ACL rupture in 20 professional soccer players. These then had surgical reconstruction (ACL group) and completed follow-up testing before RTS. Healthy controls (uninjured group) were tested at the same time as the ACL group preinjury. Values recorded at RTS of the ACL group were compared with preinjury. We also compared the uninjured and ACL groups at baseline and RTS. RESULTS Compared with preinjury, ACL normalized quadriceps peak torque of the involved limb (difference = -7%), SLCMJ height (difference = -12.08%), and Reactive Strength Index modified (RSImod) (difference = -5.04%) were reduced after ACL reconstruction. No significant reductions in CMJ height, RSImod, and relative peak power were indicated at RTS in the ACL group when compared with preinjury values, but deficits were present relative to controls. The uninvolved limb improved quadriceps (difference = 9.34%) and hamstring strength (difference = 7.36%) from preinjury to RTS. No significant differences from baseline were shown in SLCMJ height, power, and reactive strength of the uninvolved limb after ACL reconstruction. CONCLUSION Strength and power in professional soccer players at RTS after ACL reconstruction were often reduced compared with preinjury values and matched healthy controls. CLINICAL RELEVANCE Deficits were more apparent in the SLCMJ, suggesting that dynamic and multijoint unilateral force production is an important component of rehabilitation. Use of the uninvolved limb and normative data to determine recovery may not always be appropriate.
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Affiliation(s)
- Luca Maestroni
- ReAct, Bergamo (BG), Italy
- London Sport Institute, School of Science and Technology, Middlesex University, London, UK
| | - Anthony Turner
- London Sport Institute, School of Science and Technology, Middlesex University, London, UK
| | | | - Daniel Cohen
- Masira Research Institute, Faculty of Health Sciences, University of Santander (UDES), Bucaramanga, Colombia
- Mindeporte (Colombian Ministry of Sport) High Performance Centre, Bogota, Colombia
| | | | | | - Paul Read
- Institute of Sport, Exercise and Health, London, UK
- Division of Surgery and Interventional Science, University College London, UK
- School of Sport and Exercise, University of Gloucestershire, Gloucester, UK
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Pamart N, Drigny J, Azambourg H, Remilly M, Macquart M, Lefèvre A, Lahjaily K, Parienti JJ, Rocamora A, Guermont H, Desvergée A, Ollitrault P, Tournoux F, Saloux E, Normand H, Reboursière E, Gauthier A, Hodzic A. Effects of a 20-Week High-Intensity Strength Training Program on Muscle Strength Gain and Cardiac Adaptation in Untrained Men: Preliminary Results of a Prospective Longitudinal Study. JMIR Form Res 2023; 7:e47876. [PMID: 37874630 PMCID: PMC10630871 DOI: 10.2196/47876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 08/19/2023] [Accepted: 08/20/2023] [Indexed: 10/25/2023] Open
Abstract
BACKGROUND As strength sports gain popularity, there is a growing need to explore the impact of sustained strength training on cardiac biventricular structure and function, an area that has received less attention compared to the well-established physiological cardiac adaptation to endurance training. OBJECTIVE This study aims to implement a 20-week high-intensity strength training program to enhance maximal muscle strength and evaluate its impact on cardiac biventricular adaptation in healthy, untrained men. METHODS A total of 27 healthy and untrained young men (mean age 22.8, SD 3.2 years) participated in a strength training program designed to increase muscle strength. The training program involved concentric, eccentric, and isometric exercise phases, conducted over a consecutive 20-week time frame with a frequency of 3 weekly training sessions. Participants were evaluated before and after 12 and 20 weeks of training through body composition analysis (bioelectrical impedance), a 12-lead resting electrocardiogram, 3D transthoracic echocardiography, cardiopulmonary exercise testing, and muscle isokinetic dynamometry. The progression of strength training loads was guided by 1-repetition maximum (RM) testing during the training program. RESULTS Of the initial cohort, 22 participants completed the study protocol. No injuries were reported. The BMI (mean 69.8, SD 10.8 kg/m² vs mean 72, SD 11 kg/m²; P=.72) and the fat mass (mean 15.3%, SD 7.5% vs mean 16.5%, SD 7%; P=.87) remained unchanged after training. The strength training program led to significant gains in 1-RM exercise testing as early as 4 weeks into training for leg extension (mean 69.6, SD 17.7 kg vs mean 96.5, SD 31 kg; P<.001), leg curl (mean 43.2, SD 9.7 kg vs mean 52.8, SD 13.4 kg; P<.001), inclined press (mean 174.1, SD 41.1 kg vs mean 229.2, SD 50.4 kg; P<.001), butterfly (mean 26.3, SD 6.2 kg vs mean 32.5, SD 6.6 kg; P<.001), and curl biceps on desk (mean 22.9, SD 5.2 kg vs mean 29.6, SD 5.2 kg; P<.001). After 20 weeks, the 1-RM leg curl, bench press, pullover, butterfly, leg extension, curl biceps on desk, and inclined press showed significant mean percentage gains of +40%, +41.1%, +50.3%, +63.5%, +80.1%, +105%, and +106%, respectively (P<.001). Additionally, the isokinetic evaluation confirmed increases in maximal strength for the biceps (+9.2 Nm), triceps (+11.6 Nm), quadriceps (+46.8 Nm), and hamstrings (+25.3 Nm). In this paper, only the training and muscular aspects are presented; the cardiac analysis will be addressed separately. CONCLUSIONS This study demonstrated that a short-term high-intensity strength training program was successful in achieving significant gains in muscle strength among previously untrained young men. We intend to use this protocol to gain a better understanding of the impact of high-intensity strength training on cardiac physiological remodeling, thereby providing new insights into the cardiac global response in strength athletes. TRIAL REGISTRATION ClinicalTrials.gov NCT04187170; https://clinicaltrials.gov/study/NCT04187170.
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Affiliation(s)
- Nicolas Pamart
- Laboratoire Interuniversitaire de Biologie de la Motricité, Université Jean Monnet, Saint Etienne, France
| | - Joffrey Drigny
- Department of Sports Medicine, Normandie Université, Centre Hospitalier Universitaire de Caen Normandie, Caen, France
| | - Hélène Azambourg
- Department of Sports Medicine, Normandie Université, Centre Hospitalier Universitaire de Caen Normandie, Caen, France
| | - Marion Remilly
- Department of Sports Medicine, Normandie Université, Centre Hospitalier Universitaire de Caen Normandie, Caen, France
| | | | | | - Kamal Lahjaily
- Department of Cardiology, Normandie Université, Centre Hospitalier Universitaire de Caen Normandie, Caen, France
| | - Jean Jacques Parienti
- Centre de Recherche Clinique, Centre Hospitalier Universitaire de Caen Normandie, Caen, France
| | - Amélia Rocamora
- Centre de Recherche Clinique, Centre Hospitalier Universitaire de Caen Normandie, Caen, France
| | - Henri Guermont
- Department of Sports Medicine, Normandie Université, Centre Hospitalier Universitaire de Caen Normandie, Caen, France
| | - Antoine Desvergée
- Department of Sports Medicine, Normandie Université, Centre Hospitalier Universitaire de Caen Normandie, Caen, France
| | - Pierre Ollitrault
- Department of Sports Medicine, Normandie Université, Centre Hospitalier Universitaire de Caen Normandie, Caen, France
- Department of Cardiology, Normandie Université, Centre Hospitalier Universitaire de Caen Normandie, Caen, France
| | - Francois Tournoux
- Research Center of the Montreal University Hospital, Montreal University, Montreal, QC, Canada
| | - Eric Saloux
- Department of Cardiology, Normandie Université, Centre Hospitalier Universitaire de Caen Normandie, Caen, France
| | - Hervé Normand
- Inserm Comete, GIP Cyceron, Normandie Université, Caen, France
| | - Emmanuel Reboursière
- Department of Sports Medicine, Normandie Université, Centre Hospitalier Universitaire de Caen Normandie, Caen, France
| | - Antoine Gauthier
- UFR STAPS, Normandie Université, Caen, France
- Inserm Comete, GIP Cyceron, Normandie Université, Caen, France
| | - Amir Hodzic
- Department of Sports Medicine, Normandie Université, Centre Hospitalier Universitaire de Caen Normandie, Caen, France
- Department of Cardiology, Normandie Université, Centre Hospitalier Universitaire de Caen Normandie, Caen, France
- Inserm Comete, GIP Cyceron, Normandie Université, Caen, France
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Croci E, Born P, Eckers F, Nüesch C, Baumgartner D, Müller AM, Mündermann A. Test-retest reliability of isometric shoulder muscle strength during abduction and rotation tasks measured using the Biodex dynamometer. J Shoulder Elbow Surg 2023; 32:2008-2016. [PMID: 37178965 DOI: 10.1016/j.jse.2023.03.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 03/13/2023] [Accepted: 03/22/2023] [Indexed: 05/15/2023]
Abstract
BACKGROUND The Constant score (CS) is often used clinically to assess shoulder function and includes a muscle strength assessment only for abduction. The aim of this study was to evaluate the test-retest reliability of isometric shoulder muscle strength during various positions of abduction and rotation with the Biodex dynamometer and to determine their correlation with the strength assessment of the CS. METHODS Ten young healthy subjects participated in this study. Isometric shoulder muscle strength was measured during 3 repetitions for abduction at 10° and 30° abduction in the scapular plane (with extended elbow and hand in neutral position) and for internal and external rotation (with the arm at 15° abduction in the scapular plane and elbow flexed at 90°). Muscle strength tests with the Biodex dynamometer were measured in 2 different sessions. The CS was acquired only in the first session. Intraclass correlation coefficients (ICCs) with 95% confidence interval, limits of agreement, and paired t tests for repeated tests of each abduction and rotation task were calculated. Pearson's correlation between the strength parameter of the CS and isometric muscle strength was investigated. RESULTS Muscle strength did not differ between tests (P > .05) with good to very good reliabilities for abduction at 10° and 30°, external rotation and internal rotation (ICC >0.7 for all). A moderate correlation of the strength parameter of the CS with all isometric shoulder strength parameters was observed (r > 0.5 for all). CONCLUSION Shoulder muscle strength for abduction and rotation measured with the Biodex dynamometer are reproducible and correlate with the strength assessment of the CS. Therefore, these isometric muscle strength tests can be further employed to investigate the effect of different shoulder joint pathology on muscle strength. These measurements consider a more comprehensive functionality of the rotator cuff than the single strength evaluation in abduction within the CS as both abduction and rotation are assessed. Potentially, this would allow for a more precise differentiation between the various outcomes of rotator cuff tears.
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Affiliation(s)
- Eleonora Croci
- Department of Biomedical Engineering, University of Basel, Basel, Switzerland; Department of Orthopaedics and Traumatology, University Hospital Basel, Basel, Switzerland.
| | - Patrik Born
- Department of Orthopaedics and Traumatology, University Hospital Basel, Basel, Switzerland
| | - Franziska Eckers
- Department of Orthopaedics and Traumatology, University Hospital Basel, Basel, Switzerland
| | - Corina Nüesch
- Department of Biomedical Engineering, University of Basel, Basel, Switzerland; Department of Orthopaedics and Traumatology, University Hospital Basel, Basel, Switzerland; Department of Spine Surgery, University Hospital Basel, Basel, Switzerland; Department of Clinical Research, University of Basel, Basel, Switzerland
| | - Daniel Baumgartner
- IMES Institute of Mechanical Systems, Zurich University of Applied Sciences, Winterthur, Switzerland
| | - Andreas Marc Müller
- Department of Orthopaedics and Traumatology, University Hospital Basel, Basel, Switzerland
| | - Annegret Mündermann
- Department of Biomedical Engineering, University of Basel, Basel, Switzerland; Department of Orthopaedics and Traumatology, University Hospital Basel, Basel, Switzerland; Department of Spine Surgery, University Hospital Basel, Basel, Switzerland; Department of Clinical Research, University of Basel, Basel, Switzerland
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Vasquez-Bonilla AA, Brazo-Sayavera J, Timón R, Olcina G. Monitoring Muscle Oxygen Asymmetry as a Strategy to Prevent Injuries in Footballers. RESEARCH QUARTERLY FOR EXERCISE AND SPORT 2023; 94:609-617. [PMID: 35442862 DOI: 10.1080/02701367.2022.2026865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 12/30/2021] [Indexed: 06/14/2023]
Abstract
Purpose: It has been hypothesized that sports injury risk is explained by muscle metabolism. The objective was to evaluate the muscle oxygen saturation slopes (ΔSmO2 slopes) and muscle oxygenation asymmetry (MO2Asy) at rest and to study their associations with injuries during the pre-season. Methods: A total of 16 male and 10 female footballers participated in this study. Injuries were diagnosed and classified by level of severity during the pre-season. The workload was also evaluated using the rate of perceived exertion × training time, from which the accumulated loads. The SmO2 was measured at rest in the gastrocnemius muscle using the arterial occlusion method in the dominant and non-dominant legs. The repeated measures ANOVA, relative risk, and binary logistic regression were applied to assess the probability of injury with SmO2 and workload. Results: Higher MO2Asy and ΔSmO2 Slope 2 were found among footballer who suffered high-severity injuries and those who presented no injuries. In addition, an MO2Asy greater than 15% and an increase in accumulated load were variables that explained a greater probability of injury. Conclusion: This study presents the new concept of muscle oxygenation asymmetry in sports science and its possible application in injury prevention through the measurement of SmO2 at rest.
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12
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Costa JA, Spyrou K, Sancho A, Reis JF, Brito J. Reliability of Maximal Strength and Peak Rate of Force Development in a Portable Nordic Hamstrings Exercise Device. SENSORS (BASEL, SWITZERLAND) 2023; 23:5452. [PMID: 37420619 DOI: 10.3390/s23125452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 06/06/2023] [Accepted: 06/07/2023] [Indexed: 07/09/2023]
Abstract
The Nordic hamstring exercise (NHE) is a very popular exercise used to improve eccentric strength and prevent injuries. The aim of this investigation was to assess the reliability of a portable dynamometer that measures maximal strength (MS) and rate of force development (RFD) during the NHE. Seventeen physically active participants (34.8 ± 4.1 years; n = 2 women and n = 15 men) participated. Measurements occurred on two different days separated by 48-72 h. Test-retest reliability was calculated for bilateral MS and RFD. No significant test-retest differences were observed in NHE (test-retest [95% CI, confidence interval]) for MS [-19.2 N (-67.8; 29.4); p = 0.42] and RFD [-70.4 N·s-1 (-178.4; 37.8); p = 0.19]. MS showed high reliability (intraclass correlation coefficient [ICC] [95% CI], =0.93 [0.80-0.97] and large within-subject correlation between test and retest [r = 0.88 (0.68; 0.95)]. RFD displayed good reliability [ICC = 0.76 (0.35; 0.91)] and moderate within-subject correlation between test and retest [r = 0.63 (0.22; 0.85)]. Bilateral MS and RFD displayed a coefficient of variation of 3.4% and 4.6%, respectively, between tests. The standard error of measurement and the minimal detectable change for MS was 44.6 arbitrary units (a.u.) and 123.6 a.u., and 104.6 a.u. and 290.0 a.u. for peak RFD. This study shows that MS and RFD can be measured for NHE using a portable dynamometer. However, not all exercises are suitable to apply to determine RFD, so caution must be taken when analyzing RFD during NHE.
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Affiliation(s)
- Júlio A Costa
- Portugal Football School, Portuguese Football Federation (FPF), 1495-433 Cruz Quebrada, Portugal
| | - Konstantinos Spyrou
- Portugal Football School, Portuguese Football Federation (FPF), 1495-433 Cruz Quebrada, Portugal
- UCAM Research Center for High Performance Sport, UCAM Universidad Católica de Murcia, 30107 Murcia, Spain
- Facultad de Deporte, UCAM Universidad Católica de Murcia, 30107 Murcia, Spain
| | - António Sancho
- Faculdade de Motricidade Humana, Universidade de Lisboa, 1495-751 Lisboa, Portugal
| | - Joana F Reis
- Portugal Football School, Portuguese Football Federation (FPF), 1495-433 Cruz Quebrada, Portugal
- Faculdade de Motricidade Humana, Universidade de Lisboa, 1495-751 Lisboa, Portugal
- Interdisciplinary Center for the Study of Human Performance (CIPER), Faculdade de Motricidade Humana, Universidade de Lisboa, 1495-751 Lisboa, Portugal
| | - João Brito
- Portugal Football School, Portuguese Football Federation (FPF), 1495-433 Cruz Quebrada, Portugal
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13
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Forelli F, Barbar W, Kersante G, Vandebrouck A, Duffiet P, Ratte L, Hewett TE, Rambaud AJ. Evaluation of Muscle Strength and Graft Laxity With Early Open Kinetic Chain Exercise After ACL Reconstruction: A Cohort Study. Orthop J Sports Med 2023; 11:23259671231177594. [PMID: 37441511 PMCID: PMC10334004 DOI: 10.1177/23259671231177594] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Accepted: 03/09/2023] [Indexed: 07/15/2023] Open
Abstract
Background Open kinetic chain (OKC) exercise is an effective method to improve muscle function during rehabilitation after anterior cruciate ligament reconstruction (ACLR); however, there is controversy about its use in the early phase of rehabilitation. Purpose To determine (1) whether the use of OKC and closed kinetic chain (CKC) exercises improves quadriceps and hamstring strength in the early phase of rehabilitation after ACLR and (2) whether the early use of OKC exercise affects graft laxity at 3 and 6 months postoperatively in patients with a hamstring tendon graft. Study Design Cohort study; Level of evidence, 3. Methods This study included an intervention group that underwent OKC + CKC exercises (n = 51) and a control group that underwent CKC exercise only (n = 52). In the intervention group, OKC exercise for the quadriceps and hamstring was started at 4 weeks after ACLR. At 3 and 6 months postoperatively, isokinetic testing was performed to calculate the limb symmetry index (LSI) and the peak torque to body weight ratio (PT/BW) for the quadriceps and hamstring. Anterior knee laxity was measured by an arthrometer. Results At 3 and 6 months postoperatively, quadriceps strength was higher in the intervention group than in the control group for the LSI (3 months: 76.14% ± 0.22% vs 46.91% ± 0.21%, respectively; 6 months: 91.05% ± 0.18% vs 61.80% ± 0.26%, respectively; P < .001 for both) and PT/BW (3 months: 1.81 ± 0.75 vs 0.85 ± 0.50 N·m/kg, respectively; 6 months: 2.40 ± 0.73 vs 1.39 ± 0.70 N·m/kg, respectively; P < .001 for both). There were similar findings regarding hamstring strength for the LSI (3 months: 86.13% ± 0.22% vs 64.26% ± 0.26%, respectively; 6 months: 91.90% ± 0.17% vs 82.42% ± 0.24%, respectively; P < .001 at three months, P = .024 at 6 months) and PT/BW (3 months: 1.09 ± 0.36 vs 0.67 ± 0.39 N·m/kg, respectively; 6 months: 1.42 ± 0.41 vs 1.07 ± 0.39 N·m/kg, respectively; P < .001 for both). No significant difference in laxity was observed between the intervention and control groups at 3 or 6 months. Conclusion Early use of OKC exercise for both the quadriceps and the hamstring, in addition to conventional CKC exercise, resulted in better correction of quadriceps and hamstring strength deficits without increasing graft laxity.
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Affiliation(s)
- Florian Forelli
- Orthosport Rehab Center, Domont,
France
- Clinique de Domont, Ramsay Santé,
Domont, France
- Medical and Research Center for High
Sport Performance, Eaubonne, France
- Société Française des Masseurs
Kinésithérapeutes du Sport, Pierrefitte-sur-Seine, France
| | - Wassim Barbar
- Orthosport Rehab Center, Domont,
France
- Clinique de Domont, Ramsay Santé,
Domont, France
| | - Gwendal Kersante
- Orthosport Rehab Center, Domont,
France
- Clinique de Domont, Ramsay Santé,
Domont, France
| | | | | | - Louis Ratte
- Clinique de Domont, Ramsay Santé,
Domont, France
| | - Timothy E. Hewett
- Department of Orthopaedic Surgery,
Marshall University, Huntington, West Virginia, USA
| | - Alexandre J.M. Rambaud
- Société Française des Masseurs
Kinésithérapeutes du Sport, Pierrefitte-sur-Seine, France
- Sports Medicine Unit, Department of
Clinical and Exercise Physiology, University Hospital of Saint-Etienne, Faculty of
Medicine, Jean Monnet University, Saint-Etienne, France
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Kellis E, Sahinis C, Baltzopoulos V. Is hamstrings-to-quadriceps torque ratio useful for predicting anterior cruciate ligament and hamstring injuries? A systematic and critical review. JOURNAL OF SPORT AND HEALTH SCIENCE 2023; 12:343-358. [PMID: 35065297 DOI: 10.1016/j.jshs.2022.01.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 11/11/2021] [Accepted: 12/08/2021] [Indexed: 05/17/2023]
Abstract
BACKGROUND For the past 30 years, the hamstring (H)-to-quadriceps (Q) (H:Q) torque ratio has been considered an important index of muscle strength imbalance around the knee joint. The purpose of this systematic review was to examine the value of H:Q torque ratio as an independent risk factor for hamstring and anterior cruciate ligament (ACL) injuries. METHODS Database searches were performed to identify all relevant articles in PubMed, MEDLINE, Cochrane Library, and Scopus. Prospective studies evaluating the conventional (concentric H:Q), functional (eccentric H: concentric Q), and mixed (eccentric H at 30°/s: concentric Q at 240°/s) H:Q ratios as risk factors for occurrence of hamstring muscle strain or ACL injury were considered. Risk of bias was assessed using the Quality In Prognosis Studies tool. RESULTS Eighteen included studies reported 585 hamstrings injuries in 2945 participants, and 5 studies documented 128 ACL injuries in 2772 participants. Best evidence synthesis analysis indicated that there is very limited evidence that H:Q strength ratio is an independent risk factor for hamstring and ACL injury, and this was not different between various ratio types. Methodological limitations and limited evidence for ACL injuries and some ratio types might have influenced these results. CONCLUSION The H:Q ratio has limited value for the prediction of ACL and hamstring injuries. Monitoring strength imbalances along with other modifiable factors during the entire competitive season may provide a better understanding of the association between H:Q ratio and injury.
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Affiliation(s)
- Eleftherios Kellis
- Laboratory of Neuromechanics, Department of Physical Education and Sport Sciences at Serres, Aristotle University of Thessaloniki, Serres 62100, Greece.
| | - Chrysostomos Sahinis
- Laboratory of Neuromechanics, Department of Physical Education and Sport Sciences at Serres, Aristotle University of Thessaloniki, Serres 62100, Greece
| | - Vasilios Baltzopoulos
- Research Institute for Sport and Exercise Sciences (RISES), Faculty of Science, Liverpool John Moores University, Liverpool L3 5UX, UK
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Nakagawa Y, Tsuji K, Nakamura T, Katagiri H, Ozeki N, Shioda M, An JS, Yoshida R, Sekiya I, Koga H. Association of Infrapatellar Fat Pad Fibrosis at 3 Months After ACL Reconstruction With Short-term Clinical Outcomes and Inflammatory Cytokine Levels in the Synovial Fluid. Orthop J Sports Med 2023; 11:23259671231164122. [PMID: 37123994 PMCID: PMC10134128 DOI: 10.1177/23259671231164122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 01/17/2023] [Indexed: 05/02/2023] Open
Abstract
Background Infrapatellar fat pad (IFP) fibrosis is reportedly associated with anterior knee pain and the progression of patellofemoral osteoarthritis after anterior cruciate ligament reconstruction (ACLR). However, causes of IFP fibrosis after ACLR have not been sufficiently investigated. Purpose To compare the descriptive characteristics, clinical outcomes, and inflammatory cytokine levels in the synovial fluid between patients who underwent ACLR with versus without severe IFP fibrosis. Study Design Cohort study; Level of evidence, 3. Methods Patients who underwent primary ACLR using autologous hamstring tendon were divided into 2 groups based on magnetic resonance imaging IFP fibrosis scoring (grades 0-5) at 3 months after surgery: the severe fibrosis group (grades 4 and 5) and mild fibrosis group (grades 0-3). Synovial fluid was aspirated on postoperative day 3 or 4 to measure inflammatory cytokine levels. Patient characteristics, clinical outcomes at 3 and 12 months after surgery, and inflammatory cytokine (interleukin [IL]-1β, IL-2, IL-6, IL-8, IL-10, tumor necrosis factor-α, and interferon-γ) levels were compared between the groups. Results Of the 36 patients included, 7 were allocated to the severe fibrosis group and 29 were allocated to the mild fibrosis group. The severe fibrosis group had a significantly longer operation time (153.0 vs 116.5 minutes for mild fibrosis; P = .007). Compared with the mild fibrosis group, the severe fibrosis group had greater pain during stair climbing (2.0 vs 0.7; P = .01) and a lower extension muscle strength ratio (operated/healthy side, 52.9% vs 76.1%; P < .001) at 3 months, and the severe fibrosis group had a lower Lysholm score (93.7 vs 97.3; P = .026) and greater knee extension (0.3° vs 1.9°; P = .043) and flexion angle restriction (142.9° vs 149.0°; P = .013) at 12 months. The severe fibrosis group demonstrated higher IL-1β (2.6 vs 1.4 pg/mL; P = .022), IL-6 (2.0 vs 1.1 ng/mL; P = .029), and interferon-γ levels (11.3 vs 4.0 pg/mL; P = .044). Conclusion Severe IFP fibrosis was associated with a longer operation time, higher inflammatory cytokine level in the synovial fluid, and worse clinical outcomes at 3 and 12 months after ACLR.
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Affiliation(s)
- Yusuke Nakagawa
- Department of Orthopaedic Surgery,
Tokyo Medical and Dental University Hospital of Medicine, Tokyo, Japan
- Department of Cartilage Regeneration,
Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University,
Tokyo, Japan
| | - Kunikazu Tsuji
- Department of Orthopaedic Surgery,
Tokyo Medical and Dental University Hospital of Medicine, Tokyo, Japan
- Department of Cartilage Regeneration,
Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University,
Tokyo, Japan
| | - Tomomasa Nakamura
- Department of Orthopaedic Surgery,
Tokyo Medical and Dental University Hospital of Medicine, Tokyo, Japan
- Department of Joint Surgery and Sports
Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental
University, Tokyo, Japan
| | - Hiroki Katagiri
- Department of Orthopaedic Surgery,
Tokyo Medical and Dental University Hospital of Medicine, Tokyo, Japan
| | - Nobutake Ozeki
- Department of Orthopaedic Surgery,
Tokyo Medical and Dental University Hospital of Medicine, Tokyo, Japan
| | - Mikio Shioda
- Department of Orthopaedic Surgery,
Tokyo Medical and Dental University Hospital of Medicine, Tokyo, Japan
| | - Jae-Sung An
- Department of Orthopaedic Surgery,
Tokyo Medical and Dental University Hospital of Medicine, Tokyo, Japan
- Department of Joint Surgery and Sports
Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental
University, Tokyo, Japan
| | - Ryu Yoshida
- Department of Orthopaedic Surgery,
Tokyo Medical and Dental University Hospital of Medicine, Tokyo, Japan
- Department of Joint Surgery and Sports
Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental
University, Tokyo, Japan
| | - Ichiro Sekiya
- Department of Orthopaedic Surgery,
Tokyo Medical and Dental University Hospital of Medicine, Tokyo, Japan
| | - Hideyuki Koga
- Department of Orthopaedic Surgery,
Tokyo Medical and Dental University Hospital of Medicine, Tokyo, Japan
- Department of Joint Surgery and Sports
Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental
University, Tokyo, Japan
- Hideyuki Koga, MD, PhD,
Department of Joint Surgery and Sports Medicine, Graduate School of Medical and
Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku,
Tokyo 113-8519, Japan ()
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Bishop C, de Keijzer KL, Turner AN, Beato M. Measuring Interlimb Asymmetry for Strength and Power: A Brief Review of Assessment Methods, Data Analysis, Current Evidence, and Practical Recommendations. J Strength Cond Res 2023; 37:745-750. [PMID: 36695841 DOI: 10.1519/jsc.0000000000004384] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 08/03/2022] [Indexed: 01/26/2023]
Abstract
ABSTRACT Bishop, C, de Keijzer, KL, Turner, AN, and Beato, M. Measuring interlimb asymmetry for strength and power: A brief review of assessment methods, data analysis, current evidence, and practical recommendations. J Strength Cond Res 37(3): 745-750, 2023-The aim of this brief narrative review is to summarize the present evidence, provide recommendations for data analysis, and provide appropriate training methods to reduce strength and power asymmetries within athlete populations. Present evidence shows that a strong interest in the assessment of asymmetry exists. Despite the perceived associated relationship between asymmetry and injury and performance, a clear link is still missing. Practitioners need to be aware of this when they decide to assess asymmetries and later design training interventions. Several bilateral and unilateral tests could be used to assess asymmetries, such as isokinetic dynamometry, the isometric mid-thigh pull, squat, and Nordic hamstring exercise. Based on the current evidence, future investigations require further standardization of methodology and analysis to optimize interpretation (e.g., within session and between session), adoption, and implementation of interlimb asymmetry testing and appropriate interventions. In this review, 3 training interventions have been proposed to reduce existing lower limb asymmetries in sport populations: traditional resistance training, flywheel resistance training, and combined training interventions, with some evidence suggesting that such interventions can reduce lower limb asymmetries. Nonetheless, the number and quality of articles currently available are too limited to draw firm conclusions; therefore, further research is needed to verify whether training interventions can achieve these aims. To develop an understanding and application of interventions addressing interlimb asymmetries within the sport, greater methodological rigor should be applied toward study design, data analysis, and interpretation of future investigations and when appraising the current literature.
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Affiliation(s)
- Chris Bishop
- Faculty of Science and Technology, London Sport Institute, Middlesex University at Stone-X Stadium, London, United Kingdom; and
| | - Kevin L de Keijzer
- School of Health and Sports Science, University of Suffolk, Ipswich, United Kingdom
| | - Anthony N Turner
- Faculty of Science and Technology, London Sport Institute, Middlesex University at Stone-X Stadium, London, United Kingdom; and
| | - Marco Beato
- School of Health and Sports Science, University of Suffolk, Ipswich, United Kingdom
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Miralles-Iborra A, Elvira JLL, Urban T, Calado A, Del Coso J, Moreno-Pérez V. Agreement between isokinetic eccentric hamstring strength, Nordic hamstring strength and Nordic break-point angle in a sample of trained and healthy individuals. Eur J Sport Sci 2023; 23:155-164. [PMID: 34865597 DOI: 10.1080/17461391.2021.2014984] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Different eccentric strength assessments are used to identifying the risk of hamstring injury in athletes. However, there is scarce information to determine the association between Nordic-based measurements and the gold standard measurement of eccentric hamstring strength in an isokinetic dynamometer. To investigate the relationship of different measures of eccentric hamstring strength (break-point angle and eccentric strength during Nordic exercise) with eccentric hamstring peak torque measured with an isokinetic dynamometer. Forty-six participants volunteered to participate in this study. Eccentric peak force in the Smart-Nordic System and break-point angle measured as trunk lowering at >20°/s and >150°/s2 during the Nordic exercise via high-frequency video-analysis were compared to eccentric hamstring peak torque in an isokinetic dynamometer set to produce knee extension at 30°/s. There was a moderate association between peak eccentric strength with the Smart-Nordic and isokinetic eccentric hamstring peak torque (r = -0.65, p < 0.001, 95%CI = [-0.76-(-0.50)]). The association between Nordic break-point angle measured at 20°/s (r = 0.49, p < 0.001, 95%CI = [0.30-0.64]) and at 150°/s2 (r = 0.52, p < 0.001, 95%CI = [0.33-0.66]) presented statistically significant but lower associations with isokinetic eccentric hamstring peak torque. All Nordic-based measurements presented acceptable associations with the gold standard isokinetic eccentric hamstring peak torque. However, peak eccentric force measured on the Smart-Nordic device had a better agreement with eccentric peak torque measured with an isokinetic dynamometer than the video-based measurements.Highlights Peak eccentric force measured on the isometric strain-gauges device had a better agreement with eccentric hamstring peak torque measured with an isokinetic dynamometer than the break-point angle.The Nordic-based measurements are an alternative cost-effective method to assess eccentric muscle strength and weakness when the access to isokinetic dynamometry is not feasible.Caution should be taken with certain variables such as participants body mass, hip position and movement speed when interpreting the results of Nordic-based measurements.
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Affiliation(s)
- A Miralles-Iborra
- Sports Research Centre (Department of Sport Sciences), Miguel Hernandez University of Elche, Alicante, Spain
| | - J L L Elvira
- Sports Research Centre (Department of Sport Sciences), Miguel Hernandez University of Elche, Alicante, Spain
| | - T Urban
- Sports Research Centre (Department of Sport Sciences), Miguel Hernandez University of Elche, Alicante, Spain
| | - A Calado
- Rio Ave Rendimento, Rio Ave FC, Vila do Conde, Portugal
| | - J Del Coso
- Centre for Sport Studies, Rey Juan Carlos University, Madrid, Spain
| | - V Moreno-Pérez
- Sports Research Centre (Department of Sport Sciences), Miguel Hernandez University of Elche, Alicante, Spain.,Center for Translational Research in Physiotherapy, Department of Pathology and Surgery, Miguel Hernandez University of Elche, San Joan, Spain
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18
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Ferguson H, Piquet J, Jemni M, Delextrat A. Effects of a Football Simulated Exercise on Injury Risk Factors for Anterior Cruciate Ligament (ACL) Injury in Amateur Female Players. BIOLOGY 2023; 12:biology12010124. [PMID: 36671816 PMCID: PMC9855934 DOI: 10.3390/biology12010124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/09/2023] [Accepted: 01/11/2023] [Indexed: 01/15/2023]
Abstract
Females are more at risk of Anterior Cruciate Ligament (ACL) injuries than males; however, there is limited literature on neuromuscular risk factors such as angle-specific hamstring/quadriceps functional strength ratios (Hecc/Qcon) and rate of torque development (RTD) in female footballers. The aim of this study was to investigate the effects of fatigue on these neuromuscular risk factors. Thirty-three amateur players (20.3 ± 2.0 years old, 1.67 ± 9.31 m, 63.4 ±8.1 kg, 23.6 ± 5.7% body fat) performed strength assessments of the quadriceps (concentrically, Qcon) and hamstrings (eccentrically, Hecc) on both legs on an isokinetic dynamometer, before and immediately after a football-specific exercise. Results showed significantly lower peak Hecc (-15.1 to -15.5%), peak Hecc/Qcon (-8.8 to -12.9%) and RTD (-14.0 to -17.0%) for hamstring eccentric contractions after fatigue in the dominant and non-dominant legs. Furthermore, significant decreases in Hecc/Qcon were observed at 10° only in the dominant leg (-15.5%), and at 10°, 20° and 30° in the non-dominant leg (-15.1 to -21.8%). These results suggest a reduced capacity of the hamstrings to stabilise the knee joint with fatigue. Unlike results previously shown on men, the non-dominant leg seemed more affected, highlighting the need to consider specific prevention measures in females.
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Affiliation(s)
- Harriet Ferguson
- Department of Sport and Health Sciences and Social Work, Oxford Brookes University, Oxford OX3 8HU, UK
| | - Jessica Piquet
- Department of Sport and Health Sciences and Social Work, Oxford Brookes University, Oxford OX3 8HU, UK
| | - Monèm Jemni
- The Carrick Institute of Neuroscience, Cap Canaveral, FL 32920, USA
| | - Anne Delextrat
- Department of Sport and Health Sciences and Social Work, Oxford Brookes University, Oxford OX3 8HU, UK
- Correspondence: ; Tel.: +44-(0)-1865-48-3610
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19
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Chantrelle M, Menu P, Crenn V, Grondin J, Daley P, Louguet B, Fouasson-Chailloux A, Dauty M. Consequences of anterior knee pain after anterior cruciate ligament reconstruction: A 2015-2020 cohort study. PLoS One 2023; 18:e0280146. [PMID: 36603016 PMCID: PMC9815630 DOI: 10.1371/journal.pone.0280146] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 12/20/2022] [Indexed: 01/06/2023] Open
Abstract
Anterior cruciate ligament reconstruction (ACLR) using hamstring tendon (HT) graft aims to stabilise the knee, but it may bring some complications like anterior knee (AKP) pain that can have consequences on the functional aspect of this surgery. The aim of this study was to compare isokinetic knee strength and functional outcomes between patients with and without AKP following an ACLR using HT graft during the first-year post-surgery. Three hundred and thirty subjects operated by ACLR using hamstring tendon graft were included in our retrospective cohort and divided into two groups: a group with AKP (AKP+ group) and one without AKP (AKP-group). In our population, 14.8% of the patients had AKP. At 4 post-operative months, subjects with pain had lower isokinetic strength limb symmetry index (LSI) for knee flexors and extensors, and a lower Lysholm score than subjects without pain (p < 0.0001). These differences did not persist at 7 post-operative months, and there was no difference in the one-leg hop test. After multivariate analysis, we highlighted the impact of time on the evolution of these parameters. Yet, the exact definition of AKP after ACLR remains to be clearly defined since an imprecise diagnosis may lead to inappropriate management. Pre-operative information about this type of complication, which evolves favourably with time, could be useful for patients. Indeed, AKP can occur after ACLR, even if a HT graft has been used, compared to other surgical procedures using the knee extensor apparatus as patellar tendon graft (AKP is associated with the donor site morbidity). In case of AKP after ACLR, monitoring the muscle inhibition by isokinetic tests may enable clinicians to adapt the retraining and the return to sport.
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Affiliation(s)
- Marie Chantrelle
- Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, Nantes, France
- Département de Médecine Physique et de Réadaptation, Centre Hospitalier Universitaire d’Angers, Angers, France
| | - Pierre Menu
- Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes Université, Nantes, France
- Institut Régional de Médecine du Sport (IRMS), Nantes, France
- Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, ONIRIS, Nantes Université, Nantes, France
| | - Vincent Crenn
- Clinique Chirugicale Othopédique et Traumatologique, CHU Nantes, Nantes Université, Nantes, France
| | - Jérôme Grondin
- Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes Université, Nantes, France
| | - Pauline Daley
- Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes Université, Nantes, France
| | - Bastien Louguet
- Service de Médecine du Sport, CHU Nantes, Nantes Université, Nantes, France
- Institut Régional de Médecine du Sport (IRMS), Nantes, France
| | - Alban Fouasson-Chailloux
- Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes Université, Nantes, France
- Institut Régional de Médecine du Sport (IRMS), Nantes, France
- Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, ONIRIS, Nantes Université, Nantes, France
- * E-mail:
| | - Marc Dauty
- Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes Université, Nantes, France
- Institut Régional de Médecine du Sport (IRMS), Nantes, France
- Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, ONIRIS, Nantes Université, Nantes, France
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20
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Intersession Variability of Knee Extension Kinetics Using a Strain Gauge Device With Differing Clinically Practical Physical Constraints. J Sport Rehabil 2023; 32:96-101. [PMID: 36395761 DOI: 10.1123/jsr.2022-0152] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 08/27/2022] [Accepted: 09/11/2022] [Indexed: 11/18/2022]
Abstract
CONTEXT Intrasession reliabilities of isometric knee extension kinetics via portable strain gauge have been reported across several knee joint angles and constraints. However, intersession variabilities, which are more valuable, have yet to be determined. Therefore, we aimed to quantify the intersession variability of knee extension kinetics over 3 testing sessions using an affordable and portable strain gauge. DESIGN Participants performed maximum voluntary isometric contractions of the knee extensors over 3 sessions. METHODS Eleven (6 men and 5 women; 31 [6.4] y) volunteers performed maximum voluntary isometric contractions in constrained (isokinetic setup with thigh and chest straps) and unconstrained (treatment plinth) conditions. Peak force (PF), peak rate of force development, rate of force development (RFD), and impulse (IMP) from 20% to 80% of PF were assessed. Means, SDs, percentage changes, minimal detectable changes, coefficients of variation (CV), and intraclass correlation coefficients (ICC) were calculated and reported. RESULTS PF had the lowest intersession variability regardless of condition (CV = 5.5%-13.8%, ICC = .67-.93). However, variability of peak rate of force development (CV [range] = 12.2%-24.7%, ICC = .50-.78), RFD (CV = 10.0%-26.8%, ICC = .48-.84), and IMP (CV = 15.2%-35.4%, ICC = .44-.88) was moderate at best. The constrained condition (CV [SD] = 14.1% [4.8%], ICC = .74 [.08]) had lower variability compared with the plinth (CV = 19.8% [7.9%], ICC = .68 [.15]). Variability improved from sessions 1 to 2 (CV = 20.4% [7.7%], ICC = .64 [.14]) and to sessions 2 to 3 (CV = 15.3% [6.4%], ICC = .76 [.10]). CONCLUSIONS PF can be assessed regardless of setup. However, RFD and IMP changes across sessions should be approached with caution. Backrests and thigh straps improve RFD and IMP variability, and at least 1 familiarization session should be provided before relying on knee-extensor kinetics while utilizing a portable strain gauge.
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21
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The investigation of isokinetic knee strength and injury risks of taekwondo and wrestling athletes. TURKISH JOURNAL OF KINESIOLOGY 2022. [DOI: 10.31459/turkjkin.1191224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Taekwondo and wrestling are two different Olympic combat sports that need lower extremity strength in different ways. During the training process that lasts for many years, the harmony in the leg muscles may be dissimilar. This study aims to determine (1) the extension and flexion strength values of elite taekwondo and wrestling athletes with similar physical and demographic characteristics and (2) the muscle balances formed after long-term taekwondo and wrestling training. This study was conducted with the voluntary participation of 20 elite taekwondo and wrestling athletes (Avg. age 20.4±1.27 years; experience: 10.6±1.98 years; height 176.65±5.86 cm; weight 72.96±6, 96 kg; BMI 23.35±1.47 kg/m2). Following the determination of the demographic and physical characteristics of the athletes, their isokinetic knee strengths were examined at an angular velocity of 600/s and compared between branches. Accordingly, the differences between the relative and average peak torque strengths of the athletes were significant in favour of the taekwondo players in the extension strength; On the other hand, the hamstring/quadriceps strength ratios of the taekwondo athletes were lower (p0.05). The study results showed that taekwondo players have higher extensor strength; Thus, extended taekwondo training allows more balanced hamstring/quadriceps muscle harmony than wrestling. Eventually, long-term wrestling training can cause muscle imbalances and injuries in athletes.
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22
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Chavarro-Nieto C, Beaven M, Gill N, Hébert-Losier K. Reliability of Repeated Nordic Hamstring Strength in Rugby Players Using a Load Cell Device. SENSORS (BASEL, SWITZERLAND) 2022; 22:9756. [PMID: 36560125 PMCID: PMC9785535 DOI: 10.3390/s22249756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/06/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
Hamstring strain injuries are one of the most common injuries in Rugby Union players, representing up to 15% of all sustained injuries. The Nordic eccentric hamstring test assesses the maximal hamstring eccentric strength and imbalances between limbs. Asymmetries and deficits in hamstring strength between legs are commonly assessed and used as screening methods to prevent injuries which can only be proven effective if hamstring strength measures are reliable over time. We conducted a repeated-measures reliability study with 25 male Rugby Union players. Nordic eccentric strength and bilateral strength balance was assessed. Three testing sessions were undertaken over three consecutive weeks. Intrasession and intersession reliabilities were assessed using typical errors (TE), coefficient of variations (CV), and intraclass correlation coefficients (ICC). Our results showed good intrasession reliability (ICC = 0.79-0.90, TE = 26.8 N to 28.9 N, CV = 5.5% to 6.7%), whilst intersession reliability was fair for mean and the max (ICC = 0.52-0.64, TE = 44.1 N to 55.9 N, CV from 7.4% to 12.5%). Regarding the bilateral strength balance ratios, our results showed good intrasession reliability (ICC = 0.62-0.89, TE = 0.5, CV = 4.4% to 7.2%), whilst the intersession reliability for mean and max values was fair (ICC = 0.52-0.54) with a good absolute intersession reliability CV ranging from 8.2% to 9.6%. Assessing the Nordic eccentric hamstring strength and the bilateral strength balance in Rugby players using a load cell device is a feasible method to test, and demonstrated good intrasession and fair intersession reliability. Nordic eccentric strength assessment is a more practical and functional test than isokinetic; we provide data from Rugby Union players to inform clinicians, and to establish normative values in this cohort.
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Affiliation(s)
- Christian Chavarro-Nieto
- Division of Health, Engineering, Computing and Science, Te Huataki Waiora School of Health, University of Waikato, Adams Centre for High Performance, Tauranga 3116, New Zealand
| | - Martyn Beaven
- Division of Health, Engineering, Computing and Science, Te Huataki Waiora School of Health, University of Waikato, Adams Centre for High Performance, Tauranga 3116, New Zealand
| | - Nicholas Gill
- Division of Health, Engineering, Computing and Science, Te Huataki Waiora School of Health, University of Waikato, Adams Centre for High Performance, Tauranga 3116, New Zealand
- New Zealand Rugby, Wellington 6011, New Zealand
| | - Kim Hébert-Losier
- Division of Health, Engineering, Computing and Science, Te Huataki Waiora School of Health, University of Waikato, Adams Centre for High Performance, Tauranga 3116, New Zealand
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23
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Watson MD, Collins BK, Davies GJ, Riemann BL. The Influence of Hip Flexion and Isokinetic Velocity on Hamstrings-Quadriceps Strength Ratios in Healthy Females. RESEARCH QUARTERLY FOR EXERCISE AND SPORT 2022; 93:695-701. [PMID: 34735309 DOI: 10.1080/02701367.2021.1908508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 03/18/2021] [Indexed: 06/13/2023]
Abstract
Context: Measurements of the concentric hamstrings-quadriceps strength ratio (Hc:Qc) are almost exclusively recorded in the upright, seated position (hip flexion 80-100°) on an isokinetic dynamometer at angular velocities ranging from 30°/s to 360°/s. Further, there is a scarcity of data examining Hc:Qc ratio in females. Objective: To compare the effects of hip-flexion position (0°, 45°, and 90°) and isokinetic velocity (60°/s, 180°/s, and 300°/s) on knee-extension and knee-flexion torques and the Hc:Qc ratio of females. Design: Single-session, repeated measures. Setting: Biomechanics laboratory. Participants: Twenty-seven healthy young female adults. Intervention: Participants completed five repetitions of isokinetic, concentric knee-flexion and knee-extension at hip flexions of 0° (supine), 45° (midrange), and 90° (traditional), at 60°/s, 180°/s, and 300°/s. Main Outcome Measures: Knee extension and flexion average peak torque (PT) and resultant Hc:Qc ratios. Results: Knee-extension average PT was significantly influenced by isokinetic velocity but hip-flexion position was not. Compared to 90°, knee-flexion average PT was significantly greater in the 45° and 0° hip positions, coupled with greater average PT decreases between 60°/s and 180°/s than between 180°/s and 300°/s. Hc:Qc ratios in the 0° position were significantly greater than in the other positions and increased significantly as testing velocity increased. Conclusions: Exclusively using a seated, upright position during knee isokinetic testing on females may misrepresent knee strength at more-functional hip positions. We recommend evaluating isokinetic knee strength using a supine position to better reflect hip positions during daily and sporting activities, throughout movement specific velocities.
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24
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Ivarsson A, Cronström A. Agreement Between Isokinetic Dynamometer and Hand-held Isometric Dynamometer as Measures to Detect Lower Limb Asymmetry in Muscle Torque After Anterior Cruciate Ligament Reconstruction. Int J Sports Phys Ther 2022; 17:1307-1317. [PMID: 36518830 PMCID: PMC9718723 DOI: 10.26603/001c.39798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 09/11/2022] [Indexed: 12/02/2022] Open
Abstract
Background Two commonly used instruments to assess muscle strength after anterior cruciate ligament reconstruction are the isokinetic dynamometer, which measures isokinetic torque and the hand-held dynamometer, which measures isometric torque. Isokinetic dynamometers are considered superior to other instruments but may not be commonly used in clinical settings. Hand-held dynamometers are small, portable, and more clinically applicable devices. Purpose The purpose of this study was to assess agreement between a hand-held dynamometer and an isokinetic dynamometer, used to assess lower limb symmetry in knee muscle torque one year after anterior cruciate ligament (ACL) reconstruction. Study design Cross-sectional measurement study. Methods Seventy-two participants who had undergone ACL reconstruction (35 men, 37 women; age= 25.8 ± 5.4 years) were included. Isokinetic muscle torque in knee flexion and extension was measured with an isokinetic dynamometer. Isometric flexion and extension knee muscle torque was measured with a hand-held dynamometer. Bland & Altman plots and Cohen's Kappa coefficient were used to assess agreement between measurements obtained from the instruments. Result Bland & Altman plots showed wide limits of agreement between the instruments for both flexion and extension limb symmetry index. Cohen´s Kappa coefficient revealed a poor to slight agreement between the extension limb symmetry index values (0.136) and a fair agreement for flexion limb symmetry index values (0.236). Cross-tabulations showed that the hand-held dynamometer detected a significantly larger number of participants with abnormal flexion torque limb symmetry index compared to the isokinetic dynamometer. Conclusion The wide limits of agreements and Cohen's Kappa coefficients values revealed insufficient agreement between the measurements taken with the two instruments, indicating that the instruments should not be used interchangeably. The hand-held dynamometer was more sensitive in detecting abnormal limb symmetry index in flexion torque, which promotes the option of use of hand-held dynamometers to detect differences between the injured and uninjured leg after ACL reconstruction. Level of evidence 3b.
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Affiliation(s)
| | - Anna Cronström
- Department of Health Sciences Lund University
- Department of Community Medicine and Rehabilitation Umeå University, Umeå, Sweden
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25
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Dauty M, Menu P, Daley P, Grondin J, Quinette Y, Crenn V, Fouasson-Chailloux A. Knee Strength Assessment and Clinical Evaluation Could Predict Return to Running after Anterior Cruciate Ligament Reconstruction Using Patellar Tendon Procedure. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:13396. [PMID: 36293974 PMCID: PMC9603555 DOI: 10.3390/ijerph192013396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 09/29/2022] [Accepted: 10/12/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND AND OBJECTIVES Muscle knee strength is a major parameter that allows return to running. Isokinetic strength parameters may predict return to running 4 months after ACLR using the bone-patellar-tendon-bone procedure. MATERIALS AND METHODS The isokinetic knee strength of 216 patients (24.5 ± 5 years) was measured 4 months after surgery, and progressive return to running was allowed. The effectiveness of return to running was reported at 6 months. Return to running prediction was established using multivariate logistic regression. Predictive parameters were presented with a ROC curve area to define the best cut-off, with sensibility (Se) and specificity (Sp). RESULTS A model was established, including the limb symmetry index (LSI), and 103 patients (47.6%) were able to run between the fourth and the sixth month after surgery. These patients presented significantly fewer knee complications, a better Lysholm score, a better Quadriceps and Hamstring LSI and better quadriceps strength reported for body weight on the operated limb. The best model was established including the Quadriceps and Hamstring LSI at 60°/s and the Lysholm score. The cut-off for Quadriceps LSI was 60% (ROC curve area: 0.847; Se: 77.5%; Sp: 77%), for Hamstring LSI 90% (ROC curve area: 0.716; Se: 65.7%; Sp: 60.2%) and for Lyshom score 97 points (ROC curve area: 0.691; Se: 65%; Sp: 66%). CONCLUSION Four months after ACLR using a bone-patellar-tendon-bone procedure, the Quadriceps and Hamstring LSI associated to the Lysholm score could help make the decision to allow return to running.
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Affiliation(s)
- Marc Dauty
- Service de Médecine Physique et Réadapatation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, 44093 Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes Université, 44093 Nantes, France
- IRMS, Institut Régional de Médecine du Sport, 44093 Nantes, France
- Inserm UMR 1229, Regenerative Medicine and Skeleton, RMeS, Nantes Université, 44042 Nantes, France
| | - Pierre Menu
- Service de Médecine Physique et Réadapatation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, 44093 Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes Université, 44093 Nantes, France
- IRMS, Institut Régional de Médecine du Sport, 44093 Nantes, France
- Inserm UMR 1229, Regenerative Medicine and Skeleton, RMeS, Nantes Université, 44042 Nantes, France
| | - Pauline Daley
- Service de Médecine Physique et Réadapatation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, 44093 Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes Université, 44093 Nantes, France
| | - Jérôme Grondin
- Service de Médecine Physique et Réadapatation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, 44093 Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes Université, 44093 Nantes, France
| | - Yonis Quinette
- Clinique Chirurgicale Orthopédique et Traumatologique, CHU Nantes, Nantes Université, 44000 Nantes, France
| | - Vincent Crenn
- Clinique Chirurgicale Orthopédique et Traumatologique, CHU Nantes, Nantes Université, 44000 Nantes, France
| | - Alban Fouasson-Chailloux
- Service de Médecine Physique et Réadapatation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, 44093 Nantes, France
- Service de Médecine du Sport, CHU Nantes, Nantes Université, 44093 Nantes, France
- IRMS, Institut Régional de Médecine du Sport, 44093 Nantes, France
- Inserm UMR 1229, Regenerative Medicine and Skeleton, RMeS, Nantes Université, 44042 Nantes, France
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26
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Dauty M, Menu P, Jolly B, Lambert S, Rocher B, Le Bras M, Jirka A, Guillot P, Pretagut S, Fouasson-Chailloux A. Inpatient Rehabilitation during Intensive Refeeding in Severe Anorexia Nervosa. Nutrients 2022; 14:nu14142951. [PMID: 35889908 PMCID: PMC9322979 DOI: 10.3390/nu14142951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 07/15/2022] [Accepted: 07/16/2022] [Indexed: 02/01/2023] Open
Abstract
Severe forms of anorexia nervosa are responsible for weight loss and life-threatening consequences. Refeeding represents a real psychiatric and somatic challenge. Physical activities are usually not recommended during intensive refeeding in order to avoid energy expenditure. This study assessed the interest in an early return to controlled physical activities, during a hospitalization in a Physical Medicine and Rehabilitation (PMR) department, including continuous nasogastric refeeding and psychiatric care. A total of 37 subjects aged 32 ± 11 years old performed inpatient physical activities during nasogastric refeeding initiated after intensive care. The physical activity program was adapted according to the hyperactivity of the patients. Evaluation parameters were weight, body mass index (BMI), body composition (fat, lean, and bone masses), and function (strength, balance, walking, ventilation). Patient satisfaction, re-hospitalizations, and physical activities continuation were assessed at 12 months of follow-up. Weight, BMI, and body fat increased significantly (+2.7 ± 1.7 kg; +1.0 ± 0.6 kg/m2; +1.7 ± 2.5 kg, respectively). Muscle strength increased even if the lean mass did not. Walking distance, balance, and respiratory function were significantly improved. Weight and fat mass gains did not differ according to the presence or absence of hyperactivity. At 12 months, 46% of the patients continued to be physically active, but 21% of the patients had been re-hospitalized. The early return to controlled physical activities in PMR hospitalization does not compromise the efficiency of intensive refeeding in severe anorexia nervosa patients.
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Affiliation(s)
- Marc Dauty
- Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, 44093 Nantes, France; (M.D.); (P.M.); (B.J.)
- Service de Médecine du Sport, CHU Nantes, Nantes Université, 44093 Nantes, France;
- IRMS, Institut Régional de Médecine du Sport, 44093 Nantes, France
- Inserm UMR 1229, Regenerative Medicine and Skeleton, RMeS, Nantes Université, ONIRIS, 44042 Nantes, France
| | - Pierre Menu
- Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, 44093 Nantes, France; (M.D.); (P.M.); (B.J.)
- Service de Médecine du Sport, CHU Nantes, Nantes Université, 44093 Nantes, France;
- IRMS, Institut Régional de Médecine du Sport, 44093 Nantes, France
- Inserm UMR 1229, Regenerative Medicine and Skeleton, RMeS, Nantes Université, ONIRIS, 44042 Nantes, France
| | - Baptiste Jolly
- Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, 44093 Nantes, France; (M.D.); (P.M.); (B.J.)
| | - Sylvain Lambert
- Psychiatrie et Santé Mentale, UIC 18, CHU Nantes, Nantes Université, 44000 Nantes, France; (S.L.); (B.R.)
| | - Bruno Rocher
- Psychiatrie et Santé Mentale, UIC 18, CHU Nantes, Nantes Université, 44000 Nantes, France; (S.L.); (B.R.)
| | - Maëlle Le Bras
- Service d’Endocrinologie, Diabétologie et Nutrition, Institut du Thorax, CHU Nantes, Nantes Université, 44000 Nantes, France;
| | - Adam Jirka
- Equipe Transversale D’assistance Nutritionnelle, CHU Nantes, Nantes Université, 44000 Nantes, France;
| | - Pascale Guillot
- Service de Rhumatologie, CHU Nantes, Nantes Université, 44000 Nantes, France;
| | - Stéphane Pretagut
- Service de Médecine du Sport, CHU Nantes, Nantes Université, 44093 Nantes, France;
- IRMS, Institut Régional de Médecine du Sport, 44093 Nantes, France
| | - Alban Fouasson-Chailloux
- Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes Université, 44093 Nantes, France; (M.D.); (P.M.); (B.J.)
- Service de Médecine du Sport, CHU Nantes, Nantes Université, 44093 Nantes, France;
- IRMS, Institut Régional de Médecine du Sport, 44093 Nantes, France
- Inserm UMR 1229, Regenerative Medicine and Skeleton, RMeS, Nantes Université, ONIRIS, 44042 Nantes, France
- Correspondence:
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Relevant Strength Parameters to Allow Return to Running after Primary Anterior Cruciate Ligament Reconstruction with Hamstring Tendon Autograft. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19148245. [PMID: 35886096 PMCID: PMC9322324 DOI: 10.3390/ijerph19148245] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 06/28/2022] [Accepted: 07/04/2022] [Indexed: 11/20/2022]
Abstract
After anterior cruciate ligament reconstruction (ACLR), a progressive process is followed from rehabilitation to the return to sport including a crucial step known as the return to running. Return to running (RTR) can be predicted by an isokinetic knee strength assessment at 4 months post-surgery. All patients who had primarily undergone ACLR with a hamstring autograft procedure between 2010 and 2020 were included in this study. Four months after surgery, patients were evaluated using an isokinetic knee strength test. Patients were monitored until the 6th month post-surgery to see if they had returned to running. Comparisons were carried out between the two groups—the RTR and the no-RTR. A multivariate logistic regression analysis was used to predict the RTR status from explicative parameters. Receiver Operating Characteristic (ROC) curves were established to identify cutoffs with their characteristics. A total of 413 patients were included and 63.2% returned to running at 4 months post-surgery. The mean Lysholm score, knee complication rate, and isokinetic parameters were statistically different between both groups. Using a multivariate logistic regression model and ROC curves, the best isokinetic parameter to assist with the decision to allow an RTR was the quadriceps limb symmetry index at 60°/s with a cutoff of 65%. The hamstring LSI at 180°/s could be added (cutoff of 80%) to slightly increase the prediction of an RTR. Quadriceps strength normalized to body weight at 60°/s is a useful parameter (cutoff: 1.60 Nm/kg) but measurements on both sides are necessary. Isokinetic parameters are objective parameters to allow a return to running at 4 months after ACLR with a hamstring procedure.
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Aizawa J, Hirohata K, Ohji S, Ohmi T, Mitomo S, Koga H, Yagishita K. Cross-sectional study on relationships between physical function and psychological readiness to return to sport after anterior cruciate ligament reconstruction. BMC Sports Sci Med Rehabil 2022; 14:97. [PMID: 35650622 PMCID: PMC9161472 DOI: 10.1186/s13102-022-00491-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Accepted: 05/23/2022] [Indexed: 11/10/2022]
Abstract
BACKGROUND Information about specific factors of physical function that contribute to psychological readiness is needed to plan rehabilitation for a return to sports. The purpose of this study was to identify specific physical functions related to the psychological readiness of patients aiming to return to sports 6 months after reconstruction. We hypothesized that the knee strength is a factor related to the Anterior Cruciate Ligament-Return to Sport after Injury scale (ACL-RSI) cutoff score for a return to sports. METHODS This was a cross-sectional study. Fifty-four patients who had undergone primary reconstruction using hamstring tendon participated in this study. Psychological readiness was measured using the ACL-RSI in patients at 6 months after reconstruction. To identify specific physical functions related to the ACL-RSI score, participants were divided into groups with ACL-RSI scores of ≥ 60 or < 60. Non-paired t-tests or the Mann-Whitney test were performed to analyze group differences in objective variables in physical function: (1) knee strength in both legs; (2) leg anterior reach distance on both sides; and (3) single-leg hop (SLH) distances in three directions for both legs. RESULTS Significant differences between groups were identified in knee flexion strength (60°/s) for the uninvolved limb, hamstring-to-quadriceps ratio (60°/s) for the uninvolved limb, knee flexion strength (180°/s) for the involved limb, limb symmetry index (LSI) of leg anterior reach distance, the ratio of the distance to the height of the patient and LSI of SLH distances in lateral and medial directions. CONCLUSION This study revealed that at 6 months after reconstruction, increased knee flexion strength (ratio of peak torque measured to body mass of the patient), hamstring-to-quadriceps ratio, leg anterior reach distance LSI, and lateral and medial SLH appear important to exceed the ACL-RSI cutoff for a return to sports. The present results may be useful for planning post-operative rehabilitation for long-term return to sports after reconstruction.
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Affiliation(s)
- Junya Aizawa
- Department of Physical Therapy, Faculty of Health Science, Juntendo University, 3-2-12 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan. .,Department of Rehabilitation Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Kenji Hirohata
- Clinical Center for Sports Medicine and Sports Dentistry, Tokyo Medical and Dental University, Tokyo, Japan
| | - Shunsuke Ohji
- Clinical Center for Sports Medicine and Sports Dentistry, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takehiro Ohmi
- Clinical Center for Sports Medicine and Sports Dentistry, Tokyo Medical and Dental University, Tokyo, Japan
| | - Sho Mitomo
- Clinical Center for Sports Medicine and Sports Dentistry, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hideyuki Koga
- Department of Joint Surgery and Sports Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kazuyoshi Yagishita
- Clinical Center for Sports Medicine and Sports Dentistry, Tokyo Medical and Dental University, Tokyo, Japan
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Effectiveness of High Power Laser Therapy on Pain and Isokinetic Peak Torque in Athletes with Proximal Hamstring Tendinopathy: A Randomized Trial. BIOMED RESEARCH INTERNATIONAL 2022; 2022:4133883. [PMID: 35647184 PMCID: PMC9142273 DOI: 10.1155/2022/4133883] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 04/12/2022] [Accepted: 04/20/2022] [Indexed: 11/18/2022]
Abstract
Athletes such as long-distance runners, sprinters, hockey, and/or football players may have proximal hamstring tendinopathy (PHT). Laser therapy has been shown to be effective in tendinopathies. High power laser therapy (HPLT) is used for the treatment of several musculoskeletal conditions; however, its efficacy on PHT has not been investigated. This study is aimed at examining the effects of HPLT on pain and isokinetic peak torque (IPT) in athletes with PHT. The two-arm comparative pretest-posttest experimental design was used with random allocation of 36 athletes aged 18-35 years into two groups (experimental and conventional group). The experimental group included the application of HPLT for 3 weeks. The conventional group included treatment with a conventional physiotherapy program including ultrasound therapy, moist heat pack, and home exercises for a total of 3 weeks. Pain and IPT of the hamstring muscle were measured before and after the application of the intervention. Pain score decreased, and IPT increased significantly (p < 0.05) after application of HPLT, by 61.26% and 13.18%, respectively. In the conventional group, a significant difference (p < 0.05) was observed in pain scores only, which decreased by 41.14%. No significant difference (p > 0.05) was observed in IPT in the conventional group. When HPLT was compared with conventional physiotherapy, a significant difference was found in pain scores only. HPLT for 3 weeks was found to be effective in improving pain in athletes with PHT. However, no significant difference was found between HPLT and conventional physiotherapy (US, moist heat, and home exercises) in improving the IPT of the hamstring muscle.
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Anatomical and Neuromuscular Factors Associated to Non-Contact Anterior Cruciate Ligament Injury. J Clin Med 2022; 11:jcm11051402. [PMID: 35268493 PMCID: PMC8911271 DOI: 10.3390/jcm11051402] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/16/2022] [Accepted: 03/01/2022] [Indexed: 12/11/2022] Open
Abstract
The majority of anterior cruciate ligament (ACL) injuries occur during non-contact mechanisms. Knowledge of the risk factors would be relevant to help prevent athletes’ injuries. We aimed to study risk factors associated with non-contact ACL injuries in a population of athletes after ACL reconstruction. From a cohort of 307 athletes, two populations were compared according to the non-contact or contact mechanism of ACL injury. Gender, age and body mass index (BMI) were reported. Passive knee alignment (valgus and extension), knee laxity (KT-1000 test), and isokinetic knee strength were measured on the non-injured limb. The relationship between these factors and the non-contact sport mechanism was established with models using logistic regression analysis for the population and after selection of gender and cut-offs of age, BMI and knee laxity calculated from Receiver Operating Characteristics curve area and Youden index. Age, BMI, antero-posterior laxity, isokinetic knee strength, passive knee valgus and passive knee extension were associated with non-contact ACL injury. According to the multivariate model, a non-contact ACL injury was associated with non-modifiable factors, age (OR: 1.05; p = 0.001), passive knee extension (OR: 1.14; p = 0.001), and with one modifiable factor (Hamstring strength: OR: 0.27; p = 0.01). For women, only passive knee valgus was reported (OR: 1.27; p = 0.01). Age, passive knee extension and weak Hamstring strength were associated with a non-contact ACL injury. Hamstring strengthening could be proposed to prevent ACL injury in young male athletes or in case of knee laxity.
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Misjuk M, Rannama I. The effect of muscular strength and strength asymmetry on jumping height in soccer players. ISOKINET EXERC SCI 2022. [DOI: 10.3233/ies-200240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND: Lower limb muscular asymmetry is not well studied and may have a negative impact on performance. OBJECTIVE: To estimate how muscular strength and strength asymmetry affect jumping performance in soccer players. METHODS: Twenty-eight male professional soccer players took part in the study. The countermovement jump (CMJ) without arm swing was used to determine jumping height. Muscle strength was measured concentrically at 60 and 300∘/s. RESULTS: The peak moment of the knee extensors was positively and significantly correlated with the CMJ; r= 0.608 at 300∘/s and r= 0.489 at 60∘/s. The asymmetry of the knee flexors between the stronger and weaker leg was negatively and moderately correlated with the CMJ at 300∘/s (r=-0.396). The regression model (R2= 0.474) showed that an increase of 0.18-Nm/kg in the relative strength of the knee extensors at 300∘/s (by one SD) was related to an increase of 3-cm in the CMJ. Reducing the asymmetry of the knee flexors by 6.8 percentage points (by one SD) was related to a rise of 1.7-cm in the CMJ. CONCLUSIONS: Greater strength in the knee extensors, preferably tested at higher velocity, and reduced asymmetry in the strength of the lower hamstring muscles have a statistically significant effect on the CMJ.
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Reliability of a Clinical Test for Measuring Eccentric Knee Flexor Strength Using a Handheld Dynamometer. J Sport Rehabil 2022; 31:115-119. [PMID: 34030120 DOI: 10.1123/jsr.2020-0014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 03/16/2021] [Accepted: 03/21/2021] [Indexed: 12/16/2022]
Abstract
CONTEXT Eccentric knee flexor strength assessments have a key role in both prevention and rehabilitation of hamstring strain injuries. OBJECTIVE To verify the reliability of a clinical test for measuring eccentric knee flexor strength during the Nordic hamstring exercise using a commercially available handheld dynamometer. DESIGN Reliability study. SETTING Physical Therapy Laboratory, Federal University of Health Sciences of Porto Alegre (Brazil). PARTICIPANTS Fifty male amateur athletes (soccer or rugby players; 24 [3] y). MAIN OUTCOME MEASURES Eccentric knee flexor strength. RESULTS When compared with a load cell-based device, the clinical test using a handheld dynamometer provided smaller force values (P < .05) with large effect sizes (.92-1.21), moderate intraclass correlation (.60-.62), typical error of 30 to 31 N, and coefficient of variation of 10% to 11%. Regarding the test-retest reproducibility (2 sessions separated by 1 week), the clinical test provided similar force values (P > .05) with only small effect sizes (.20-.27), moderate to good correlation (.67-.76), typical error of 23 to 24 N, and coefficient of variation of 9% to 10%. CONCLUSION The clinical test with handheld dynamometer proposed by this study can be considered an affordable and relatively reliable tool for eccentric knee flexor strength assessment in the clinical setting, but results should not be directly compared with those provided by load cell-based devices.
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Parkinson AO, Apps CL, Morris JG, Barnett CT, Lewis MGC. The Calculation, Thresholds and Reporting of Inter-Limb Strength Asymmetry: A Systematic Review. J Sports Sci Med 2021; 20:594-617. [PMID: 35321131 PMCID: PMC8488821 DOI: 10.52082/jssm.2021.594] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 06/28/2021] [Indexed: 12/20/2022]
Abstract
The prevalence of inter-limb strength differences is well documented in the literature however, there are inconsistencies related to measurement and reporting, and the normative values and effects associated with inter-limb asymmetry. Therefore, the aims of this systematic review were to: 1) assess the appropriateness of existing indices for the calculation of asymmetry, 2) interrogate the evidence basis for literature reported thresholds used to define asymmetry and 3) summarise normative levels of inter-limb strength asymmetry and their effects on injury and performance. To conduct this systematic review, scientific databases (PubMed, Scopus, SPORTDiscus and Web of Science) were searched and a total of 3,594 articles were retrieved and assessed for eligibility and article quality. The robustness of each identified asymmetry index was assessed, and the evidence-basis of the identified asymmetry thresholds was appraised retrospectively using the references provided. Fifty-three articles were included in this review. Only four of the twelve identified indices were unaffected by the limitations associated with selecting a reference limb. Eighteen articles applied a threshold to original research to identify "abnormal" asymmetry, fifteen of which utilised a threshold between 10-15%, yet this threshold was not always supported by appropriate evidence. Asymmetry scores ranged between and within populations from approximate symmetry to asymmetries larger than 15%. When reporting the effects of strength asymmetries, increased injury risk and detriments to performance were often associated with larger asymmetry, however the evidence was inconsistent. Limitations of asymmetry indices should be recognised, particularly those that require selection of a reference limb. Failure to reference the origin of the evidence for an asymmetry threshold reinforces doubt over the use of arbitrary thresholds, such as 10-15%. Therefore, an individual approach to defining asymmetry may be necessary to refine robust calculation methods and to establish appropriate thresholds across various samples and methodologies that enable appropriate conclusions to be drawn.
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Affiliation(s)
- Amy O Parkinson
- Nottingham Trent University, School of Science and Technology, Nottingham, United Kingdom
| | - Charlotte L Apps
- Nottingham Trent University, School of Science and Technology, Nottingham, United Kingdom
| | - John G Morris
- Nottingham Trent University, School of Science and Technology, Nottingham, United Kingdom
| | - Cleveland T Barnett
- Nottingham Trent University, School of Science and Technology, Nottingham, United Kingdom
| | - Martin G C Lewis
- Nottingham Trent University, School of Science and Technology, Nottingham, United Kingdom
- University of Derby, School of Human Sciences, Derby, United Kingdom
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Bilateral Strength Asymmetry in Elite Youth Soccer Players: Differences between Age Categories. Symmetry (Basel) 2021. [DOI: 10.3390/sym13111982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The strength asymmetry of athletes as a negative health and performance factor is increasingly being researched in sports with a high load on the dominant limb when some specific unilateral movements, such as passing, jumping, and tackling, are required. This study aimed to determine the level of isokinetic strength bilateral asymmetry (BA) among knee extensors (KEs) and knee flexors (KFs) of elite youth soccer players. The sample (n = 87) consisted of three age categories of under 13 (U13), under 15 (U15), and under 17 (U17) years old. Isokinetic dynamometry was used to obtain the maximum peak torque of the KEs and KFs in the dominant and non-dominant lower limbs during concentric muscle contraction. The analysis revealed significantly lower values (p < 0.05) of BA in KEs in U17 than in younger categories, U13 and U15, and higher values (p < 0.05) of BA in KFs in the U15 category than in the U17category. The majority of the players in the U15 category (68%) reached KFs BA higher than 10% in comparison with U13 players (50%) and U17 players (28% of players) (p < 0.05). Our results showed a significant effect of age category on BA levels in young soccer players. High incidences of increased BA in the lower limbs occurred in the younger categories (U13, U15) and subsequently decreased in the later adolescent stages.
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35
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Whyte EF, Heneghan B, Feely K, Moran KA, O'Connor S. The Effect of Hip Extension and Nordic Hamstring Exercise Protocols on Hamstring Strength: A Randomized Controlled Trial. J Strength Cond Res 2021; 35:2682-2689. [PMID: 31356512 DOI: 10.1519/jsc.0000000000003220] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
ABSTRACT Whyte, EF, Heneghan, B, Feely, K, Moran, KA, and O'Connor, S. The effect of hip extension and Nordic hamstring exercise protocols on hamstring strength: A randomized controlled trial. J Strength Cond Res 35(10): 2682-2689, 2021-Lower and between-limb asymmetrical eccentric hamstring isokinetic strength may be associated with hamstring injuries, which mainly affect the biceps femoris. The 45° hip extension exercise (HEE) strengthens the hamstrings in the lengthened position where the biceps femoris experiences greatest loading during high-speed running. However, the effect of an HEE program on eccentric hamstring isokinetic strength has not been investigated or compared with the Nordic Hamstring Exercise (NHE) program. Twenty-four male, varsity, Gaelic footballers (22.4 ± 2.7 years; 182.1 ± 6.0 cm; 84.4 ± 7.9 kg) were randomly allocated to an HEE or NHE 4-week program. Isokinetic (60°·s-1) eccentric peak torque, functional hamstring-to-quadriceps ratio, and between-limb eccentric strength (absolute and percentage) asymmetries were recorded before and after intervention. Muscle soreness scores were reported after exercise using a visual analogue scale. A mixed between-within analysis of variance investigated group (HEE vs. NHE) by time (pre vs. post) interaction effects, and any main effects. An independent-samples t-test compared muscle soreness scores between the NHE and HEE groups. No interaction or group main effects were found. Main effects for time were observed on dominant and nondominant limbs for eccentric peak torque (p < 0.001, η2 = 0.21, p = 0.01, η2 = 0.51, respectively) and functional hamstring quadriceps ratio (p = 0.03, η2 = 0.59, p < 0.0001, η2 = 0.26, respectively). There were no main effects for time between-limb eccentric peak torque or percentage asymmetries (p = 0.41, η2 = 0.03, p = 0.20, η2 = 0.07, respectively), or differences in muscle soreness scores (p > 0.05). A 4-week HEE program increases eccentric hamstring isokinetic strength similar to a NHE program, which may be useful as part of a hamstring injury prevention program.
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Affiliation(s)
- Enda F Whyte
- School of Health and Human Performance, Dublin City University, Collins Avenue, Glasnevin, Dublin, Ireland
| | - Brian Heneghan
- School of Health and Human Performance, Dublin City University, Collins Avenue, Glasnevin, Dublin, Ireland
| | - Kevin Feely
- School of Health and Human Performance, Dublin City University, Collins Avenue, Glasnevin, Dublin, Ireland
- Kevin Feely Athletic Therapy, Dublin, Ireland ; and
| | - Kieran A Moran
- School of Health and Human Performance, Dublin City University, Collins Avenue, Glasnevin, Dublin, Ireland
- Insight Center for Data Analytics, Dublin City University, Dublin, Ireland
| | - Siobhán O'Connor
- School of Health and Human Performance, Dublin City University, Collins Avenue, Glasnevin, Dublin, Ireland
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Intra- and Inter-Limb Strength Asymmetry in Soccer: A Comparison of Professional and Under-18 Players. Sports (Basel) 2021; 9:sports9090129. [PMID: 34564334 PMCID: PMC8473080 DOI: 10.3390/sports9090129] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 09/03/2021] [Accepted: 09/07/2021] [Indexed: 12/03/2022] Open
Abstract
(1) Background: the present study examined the isokinetic peak torque exerted by both knee extensors and flexors, anterior–posterior imbalance and the magnitude and direction of inter-limb asymmetry in professional and academy soccer players. (2) Methods: one hundred soccer players (professional = 50, elite academy = 50) volunteered to take part in this investigation. An isokinetic dynamometer was used to measure the knee extensor (quadriceps) and flexors muscle (hamstrings) torques of the limbs as well as inter-limb asymmetries—using a standard percentage difference equation. (3) Results: professional players exhibited significantly greater (effect size [ES] = large) strength levels in the quadriceps and hamstrings under both testing conditions, significantly higher (small to moderate) intra-limb ratio values for 60°·s−1 but not for the 300°·s−1 test condition, significantly (small to moderate) lower inter-limb asymmetry values for all test conditions, with the exception of the hamstrings at 60°·s−1 and the direction of asymmetry was poor to slight, indicating that limb dominance was rarely the same between groups. (4) Conclusions: this study shows that isokinetic assessments, i.e., peak torque exerted by both knee extensors and flexors and intra-limb ratio, and the subsequent inter-limb asymmetry, i.e., magnitude and direction, can differentiate between professional and academy soccer players.
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Paulus J, Pauls J, Radizzi L, Krecke L, Bury T, Goff CL, Laly A, Schwartz C, Forthomme B, Kaux JF, Croisier JL. Knee strength measurement: Can we switch between isokinetic dynamometers? ISOKINET EXERC SCI 2021. [DOI: 10.3233/ies-193193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND: Isokinetic evaluation is considered the gold standard in muscle strength measurement due to its sensitivity, intra-dynamometer reproducibility and usefulness in the injury prevention screening and follow up of subjects with musculoskeletal pathologies, neurological disease or after surgical operation. However, can one switch among different isokinetic dynamometers for the purpose of knee muscles evaluation? OBJECTIVES: To comprehensively evaluate the compatibility of the isokinetic short concentric and eccentric strength evaluation protocol and of the fatigability resistance evaluation between three different isokinetic devices. METHODS: Eighteen recreationally active men underwent three isokinetic knee testing sessions on three different isokinetic devices with 7–10 days of rest between each session. Relative (Pearson’s r product-moment correlation coefficient – PCC) and absolute (standard error of measurement – SEM, Cohen effect sizes (d) and probabilistic inferences – MBI) parameters of reproducibility were determined to assess the inter-dynamometer agreement. RESULTS: For the short concentric and eccentric strength evaluation protocol, the extensors in concentric mode and the flexors in eccentric mode can be compared (eventually with transposition formulas provided) between Biodex, Con-Trex and Cybex (almost all PCC ⩾ 0.80). The DCR could be compared between Con-Trex and Cybex and between Biodex and Cybex pairs (eventually with transposition formula provided). For the fatigability resistance evaluation protocol, the total sum can be compared for extensors (eventually with transposition formulas provided) for PM for all dynamometer pairs considered and, in the case of MW, only for Biodex and Con-Trex (PCC ⩾ 0.80). CONCLUSIONS: Only some of the parameters derived either from the short concentric and eccentric strength evaluation protocol or the fatigability resistance evaluation protocol may be interchangeable providing transposition formulas are applied. Otherwise, isokinetic findings are largely system-dependent save some specific instances.
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Affiliation(s)
- Julien Paulus
- Department of Motricity Sciences and Physical Therapy and Rehabilitation, University of Liege, Liege, Belgium
- Laboratory of Human Motion Analysis, Clinical University of Liege, Liege, Belgium
| | - Jerome Pauls
- Medical Luxembourg Olympic Centre, Clinical Centre of Sport and Orthopaedic, Luxemburg, Duchy of Luxemburg
| | - Laurent Radizzi
- Medical Luxembourg Olympic Centre, Clinical Centre of Sport and Orthopaedic, Luxemburg, Duchy of Luxemburg
| | - Laurent Krecke
- Medical Luxembourg Olympic Centre, Clinical Centre of Sport and Orthopaedic, Luxemburg, Duchy of Luxemburg
| | - Thierry Bury
- Department of Motricity Sciences and Physical Therapy and Rehabilitation, University of Liege, Liege, Belgium
| | - Caroline Le Goff
- Multidisciplinary Medical and Sports Traumatology Service (SPORTS2), CHU, Liege, Belgium
| | - Arnaud Laly
- Training Centre of the Ligue Belge Francophone de Rugby, Liege, Belgium
| | - Cédric Schwartz
- Laboratory of Human Motion Analysis, Clinical University of Liege, Liege, Belgium
| | - Bénédicte Forthomme
- Department of Motricity Sciences and Physical Therapy and Rehabilitation, University of Liege, Liege, Belgium
- Laboratory of Human Motion Analysis, Clinical University of Liege, Liege, Belgium
- Multidisciplinary Medical and Sports Traumatology Service (SPORTS2), CHU, Liege, Belgium
| | - Jean-François Kaux
- Multidisciplinary Medical and Sports Traumatology Service (SPORTS2), CHU, Liege, Belgium
| | - Jean-Louis Croisier
- Department of Motricity Sciences and Physical Therapy and Rehabilitation, University of Liege, Liege, Belgium
- Laboratory of Human Motion Analysis, Clinical University of Liege, Liege, Belgium
- Multidisciplinary Medical and Sports Traumatology Service (SPORTS2), CHU, Liege, Belgium
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Impact of Patellar Tendinopathy on Isokinetic Knee Strength and Jumps in Professional Basketball Players. SENSORS 2021; 21:s21134259. [PMID: 34206269 PMCID: PMC8271954 DOI: 10.3390/s21134259] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/11/2021] [Accepted: 06/18/2021] [Indexed: 12/19/2022]
Abstract
Patellar tendinopathy is characterized by tendon pain which may reduce the level of performance. This study's main aim was to compare isokinetic knee strength and jump performances at the start of the sport season between players with patellar tendinopathy and those without. Secondary aims were to assess the relationship between knee strength and jump function. Sixty-two professional basketball players were enrolled (mean age: 25.0 ± 4.0). All players performed knee isokinetic measurements, single leg countermovement jumps, and one leg hop tests. Correlations between knee strength and jump performances were examined. Twenty-four players declared a patellar tendinopathy and were compared to the 38 players without tendinopathy. The isokinetic quadriceps strength was lower in cases of patellar tendinopathy, and a camel's back curve was observed in 58% of the cases of patellar tendinopathy. However, jump performances were preserved. No link was found between quadriceps and hamstring limb symmetry indexes at 60 and 180°/s with jumps. This preseason screening enabled us to identify the absence of consequences of patellar tendinopathy in professional basketball players. Jump performances were not altered, possibly due to compensatory strategies.
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Dauty M, Edouard P, Menu P, Mesland O, Fouasson-Chailloux A. Isokinetic quadriceps symmetry helps in the decision to return to running after anterior cruciate ligament reconstruction. Ann Phys Rehabil Med 2021; 65:101543. [PMID: 34091057 DOI: 10.1016/j.rehab.2021.101543] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/05/2021] [Accepted: 04/14/2021] [Indexed: 10/19/2022]
Affiliation(s)
- Marc Dauty
- CHU Nantes, Physical Medicine and Rehabilitation Center, University Hospital of Nantes, France; CHU Nantes, Service de Médecine du Sport, University Hospital of Nantes, France; INSERM UMR U1229/RMeS, Regenerative Medicine and Skeleton - Nantes University, France
| | - Pascal Edouard
- Inter-university Laboratory of Human Movement Science (LIBM EA 7424), University of Lyon, University Jean-Monnet, 42023 Saint Étienne, France; Department of Clinical and Exercise Physiology, Sports Medicine Unit, University Hospital of Saint-Etienne, Faculty of Medicine, Saint-Étienne, France
| | - Pierre Menu
- CHU Nantes, Physical Medicine and Rehabilitation Center, University Hospital of Nantes, France; CHU Nantes, Service de Médecine du Sport, University Hospital of Nantes, France; INSERM UMR U1229/RMeS, Regenerative Medicine and Skeleton - Nantes University, France
| | - Olivier Mesland
- CHU Nantes, Physical Medicine and Rehabilitation Center, University Hospital of Nantes, France; INSERM UMR U1229/RMeS, Regenerative Medicine and Skeleton - Nantes University, France
| | - Alban Fouasson-Chailloux
- CHU Nantes, Physical Medicine and Rehabilitation Center, University Hospital of Nantes, France; CHU Nantes, Service de Médecine du Sport, University Hospital of Nantes, France; INSERM UMR U1229/RMeS, Regenerative Medicine and Skeleton - Nantes University, France.
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Reza T, Hinkle AJ, Perez-Chaumont A, Brown SM, Mulcahey MK. Systematic Review of Outcome Measures Used After Proximal Hamstring Repair. Orthop J Sports Med 2021; 9:23259671211005101. [PMID: 33997081 PMCID: PMC8113800 DOI: 10.1177/23259671211005101] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 12/14/2020] [Indexed: 11/16/2022] Open
Abstract
Background: Patient-reported outcome measures are important to determine outcomes after
orthopaedic procedures. There is currently no standard for outcome measures
in the evaluation of patient outcomes after proximal hamstring repair. Purpose: To identify and evaluate outcome measures used after proximal hamstring
repair. Study Design: Systematic review; Level of evidence, 4. Methods: A systematic review was performed to identify all English-language articles
assessing outcomes after proximal hamstring repair in PubMed, Embase, CINAHL
via EBSCOhost, MEDLINE via OvidSP, and Web of Science between 2000 and 2019.
After duplicates were removed, studies were selected using eligibility
criteria established by the authors. Image reviews, anatomic/histology
studies, literature reviews, surgical technique reports, systematic reviews,
narrative reviews, case studies, and studies with <5 patients were
excluded. Extraction, synthesis, and analysis of outcome measure data were
performed using Microsoft Excel. Quality assessment of included studies was
performed using Methodological Index for Non-Randomized Studies
criteria. Results: After duplicate articles were removed, a total of 304 unique articles were
identified and 27 met the inclusion criteria. The mean number of patients
with proximal hamstring repairs per study was 40. The most frequently
reported outcome measures were return to sport (14/27; 51.9%), custom
survey/questionnaire (13/27; 48.1%), and isokinetic hamstring strength
testing (13/27; 48.1%). Six of the 10 most commonly used outcome measures
were validated and included Lower Extremity Functional Scale, 12-Item Short
Form Health Survey, visual analog scale for pain, Perth Hamstring Assessment
Tool (PHAT), Single Assessment Numeric Evaluation, and Tegner Activity
Scale. Of those, PHAT was the only validated outcome measure designed for
proximal hamstring repair. Conclusion: There is currently no consensus on the best outcome measurements for the
evaluation of patients after proximal hamstring repair. We recommend an
increased commitment to the use of return to sport, isokinetic strength
testing, Lower Extremity Functional Scale, and PHAT when assessing such
injuries. Future studies should aim to define the most reliable methods of
outcome measurement in this patient population through consistent use of
tools that are clinically relevant and important to patients and can easily
be employed in a variety of clinical scenarios.
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Affiliation(s)
- Tara Reza
- School of Medicine, Tulane University, New Orleans, Louisiana, USA
| | - Andrew J Hinkle
- School of Medicine, Tulane University, New Orleans, Louisiana, USA
| | | | - Symone M Brown
- Department of Orthopaedic Surgery, School of Medicine, Tulane University, New Orleans, Louisiana, USA
| | - Mary K Mulcahey
- Department of Orthopaedic Surgery, School of Medicine, Tulane University, New Orleans, Louisiana, USA
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Correlations between isokinetic knee torques and single-leg hop distances in three directions in patients after ACL reconstruction. BMC Sports Sci Med Rehabil 2021; 13:38. [PMID: 33836820 PMCID: PMC8033656 DOI: 10.1186/s13102-021-00265-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 03/16/2021] [Indexed: 11/25/2022]
Abstract
Background When planning rehabilitation and conditioning for performance enhancement and a return to sports after anterior cruciate ligament reconstruction, identifying the elements of physical function associated with single-leg hop is important. The purpose of this study was to clarify the relationship between single-leg hop distances in three directions and knee extensor and flexor strengths at 6 months after reconstruction. Methods Participants were 47 patients taking part in training sessions for sports involving cutting, pivoting, and jump-landing 6 months after reconstruction using a hamstring tendon. Single-leg hop distances in 3 directions (anterior, lateral, and medial) and isokinetic concentric strengths of knee extension and flexion were assessed at an angular velocity of 60°/s and 180°/s. Simple regression analyses using Spearman’s rank correlation coefficient were performed to assess relationships between single-leg hop distances and knee strengths. Results In the involved limb, correlations between single-leg hop distances in 3 directions and knee strengths were significant (P < 0.01) and correlation coefficients ranged from 0.48 to 0.65. Correlation coefficients between all single-leg hop parameters and knee extension/flexion strengths at an angular velocity of 180°/s were greater than those of 60°/s. Conclusions In this cross-sectional study of patients who participated in sports training sessions that required jump-landings and cutting approximately 6 months after reconstruction using hamstring grafts, isokinetic knee flexor, and extensor torques were moderately to strongly associated with single-leg hop distances in lateral, medial, and anterior directions. Given these relationships, assessments and exercises for knee strength and single-leg hop distances should be planned.
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Arikan H, Maras G, Akaras E, Citaker S, Kafa N. Development, reliability and validity of the Closed Kinetic Chain Lower Extremity Stability Test (CKCLEST): a new clinical performance test. Res Sports Med 2021; 30:475-490. [PMID: 33759654 DOI: 10.1080/15438627.2021.1906674] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
This study aimed to develop and determine the test-retest, intra- and interrater reliability, and validity of the Closed Kinetic Chain Lower Extremity Stability Test (CKCLEST). Three-blinded, cross-sectional, repeated-measures clinical measurement reliability trial. Fifty young adults participated in this study. To assess the reliability of CKCLEST, intraclass correlation coefficient, standard error of measurement, minimal detectable change, and Bland-Altman plot were used. For concurrent validity of CKCLEST was applied Spearman correlation analysis with Vertical Jump Test, Isokinetic Dynamometer Test, Single-Leg Hop Test, and Prone Bridge Test. All analyses were made for both the best score and the average score. CKCLEST showed excellent reliability. ICC for test-retest reliability (0.93; 0.84), intrarater reliability (rater 1: 0.90; 0.83- rater 2: 0.93; 0.85), and interrater reliability (0.90; 0.83) was calculated for average score and best score, respectively. CKCLEST was found to be moderately correlated with each of the tests. CKCLEST is a highly reliable, valid, and new clinical assessment tool.
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Affiliation(s)
- Halime Arikan
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Gazi University, Ankara, Turkey
| | - Gokhan Maras
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Gazi University, Ankara, Turkey
| | - Esedullah Akaras
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Gazi University, Ankara, Turkey
| | - Seyit Citaker
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Gazi University, Ankara, Turkey
| | - Nihan Kafa
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Gazi University, Ankara, Turkey
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Campos de Almeida TC, Paes V, Soares M, de Freitas Fonseca G, Lima M, Silva JG. Acute effect of different duration times of application of myofascial release on quadriceps femoris strength: A randomized clinical trial. J Bodyw Mov Ther 2021; 27:233-238. [PMID: 34391239 DOI: 10.1016/j.jbmt.2021.02.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 01/30/2021] [Accepted: 02/28/2021] [Indexed: 10/22/2022]
Abstract
OBJECTIVES To evaluate the effect of Miofascial Release (MFR) on knee extensors strength, at different duration times of application. METHOD 51 healthy individuals were randomly assigned to one of three groups (3min, 5min or placebo) in this randomized clinical trial. The knee extensors strength was assessed in two conditions: pre and post-intervention, using an isokinetic dynamometer, at speeds of 60° and 120°/s. MFR was applied on the anterior surface of the thigh for 3min or 5 min, according to the experimental groups. The placebo group underwent through the application of a non-therapeutic gel, associated with 3min of a light touch on the skin. Peak torque, total work and mean power were the isokinetic variables analyzed through a multivariate analysis of variance (MANOVA) with p ≤ 0.05. RESULTS Our findings suggest a main effect and interaction between moments (pre and post-intervention) and speeds (60° and 120°/s) for total work and mean power (p < 0.01). Likewise, main effect and interaction of speed were observed for peak torque (p < 0.01). There were no significant differences for the other analyzed variables. CONCLUSION No significant main effect of MFR were detected in any of the proposed application time on peak torque, total work and mean power, in the knee extensors, compared to the placebo group.
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Affiliation(s)
| | - Vanessa Paes
- Post-Graduate Program in Rehabilitation Sciences, Augusto Motta University (UNISUAM), Rio de Janeiro, Brazil; Almirante Adalberto Nunes Physical Education Center (CEFAN), Navy of Brazil, Brazil
| | - Maurício Soares
- Post-Graduate Program in Rehabilitation Sciences, Augusto Motta University (UNISUAM), Rio de Janeiro, Brazil; Almirante Adalberto Nunes Physical Education Center (CEFAN), Navy of Brazil, Brazil
| | - Guilherme de Freitas Fonseca
- Post-Graduate Program in Exercise Science and Sports University of Rio de Janeiro State (UERJ), Rio de Janeiro, Brazil
| | - Maicom Lima
- Post-Graduate Program in Rehabilitation Sciences, Augusto Motta University (UNISUAM), Rio de Janeiro, Brazil; Almirante Adalberto Nunes Physical Education Center (CEFAN), Navy of Brazil, Brazil
| | - Júlio Guilherme Silva
- Federal University of Rio de Janeiro - Medical School - Physiotherapy Department, Rio de Janeiro, Brazil.
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Shelley S, James RS, Eustace S, Eyre E, Tallis J. The effects of high adiposity on concentric and eccentric muscle performance of upper and lower limb musculature in young and older adults. Appl Physiol Nutr Metab 2021; 46:1047-1057. [PMID: 33656946 DOI: 10.1139/apnm-2020-0945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The present study uniquely examined the influence of old age and adiposity on maximal concentric and eccentric torque and fatigue of the elbow and knee (KF, KE) flexors and extensors. Forty males were recruited and categorised into young (n = 21, 23.7 ± 3.4) and old (n = 19, 68.3 ± 6.1) and then further into normal (young = 16.9 ± 2.5%, old = 20.6 ± 3.1%) and high adiposity (young = 28.9 ± 5.0%, old = 31.3 ± 4.2%) groups. Handgrip strength, sit-to-stand performance, and isokinetic assessments of peak torque at 60°, 120° and 180°·s-1 were measured. Older men produced significantly less concentric and eccentric peak torque (P < 0.016) but this was not influenced by adiposity (P > 0.055). For KE and KF, high adiposity groups demonstrated reduced peak torque normalised to body mass (P < 0.021), and muscle and contractile mode specific reduction in torque normalised to segmental lean mass. Eccentric fatigue resistance was unaffected by both age and adiposity (P > 0.30) and perceived muscle soreness, measured up to 72 hours after, was only enhanced in the upper body of the young group following eccentric fatigue (P = 0.009). Despite the impact of adiposity on skeletal muscle function being comparable between ages, these results suggest high adiposity will have greater impact on functional performance of older adults. Novelty: Irrespective of age, high adiposity may negatively impact force to body mass ratio and muscle quality in a muscle and contractile mode specific manner. Whilst the magnitude of adiposity effects is similar across ages, the impact for older adults will be more substantial given the age-related decline in muscle function.
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Affiliation(s)
- Sharn Shelley
- Centre for Sport, Exercise and Life Sciences, Faculty of Health & Life Sciences, Coventry University, Priory Street, Coventry CV1 5FB, UK.,Centre for Sport, Exercise and Life Sciences, Faculty of Health & Life Sciences, Coventry University, Priory Street, Coventry CV1 5FB, UK
| | - Rob S James
- Centre for Sport, Exercise and Life Sciences, Faculty of Health & Life Sciences, Coventry University, Priory Street, Coventry CV1 5FB, UK.,Centre for Sport, Exercise and Life Sciences, Faculty of Health & Life Sciences, Coventry University, Priory Street, Coventry CV1 5FB, UK
| | - Steven Eustace
- Centre for Sport, Exercise and Life Sciences, Faculty of Health & Life Sciences, Coventry University, Priory Street, Coventry CV1 5FB, UK.,Centre for Sport, Exercise and Life Sciences, Faculty of Health & Life Sciences, Coventry University, Priory Street, Coventry CV1 5FB, UK
| | - Emma Eyre
- Centre for Sport, Exercise and Life Sciences, Faculty of Health & Life Sciences, Coventry University, Priory Street, Coventry CV1 5FB, UK.,Centre for Sport, Exercise and Life Sciences, Faculty of Health & Life Sciences, Coventry University, Priory Street, Coventry CV1 5FB, UK
| | - Jason Tallis
- Centre for Sport, Exercise and Life Sciences, Faculty of Health & Life Sciences, Coventry University, Priory Street, Coventry CV1 5FB, UK.,Centre for Sport, Exercise and Life Sciences, Faculty of Health & Life Sciences, Coventry University, Priory Street, Coventry CV1 5FB, UK
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Effects of Autograft Types on Muscle Strength and Functional Capacity in Patients Having Anterior Cruciate Ligament Reconstruction: A Randomized Controlled Trial. Sports Med 2021; 50:1393-1403. [PMID: 32125668 DOI: 10.1007/s40279-020-01276-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
BACKGROUND The effects of different autograft types for anterior cruciate ligament reconstruction (ACL-R) on muscle function are sparsely investigated in randomized controlled trials. Our aim was to investigate the effects of quadriceps tendon autograft (QTB) vs. semitendinosus-gracilis autograft (StG) on thigh muscle strength and functional capacity, and a patient-reported outcome 1 year after ACL-R, and to compare the results to healthy controls. METHODS ACL-R patients (n = 100) and matched controls (CON, n = 50) were recruited, with patients being randomly assigned to QTB (n = 50) or StG (n = 50) ACL-R. One year after ACL-R, bilateral knee extensor (KE) and flexor (KF) muscle strength (isometric, dynamic, explosive, limb symmetry index [LSI], hamstring:quadriceps ratio [HQ ratio]) were assessed by isokinetic dynamometry, along with functional capacity (single leg hop distance [SHD]) and a patient-reported outcome (International Knee Documentation Committee [IKDC] score). RESULTS KE muscle strength of the operated leg was lower (9-11%) in QTB vs. StG as was KE LSI, while KF muscle strength was lower (12-17%) in StG vs. QTB as was KF LSI. HQ ratios were lower in StG vs. QTB. Compared with the controls, KE and KF muscle strength were lower in StG (10-22%), while KE muscle strength only was lower in QTB (16-25%). Muscle strength in the StG, QTB, and CON groups was identical in the non-operated leg. While SHD and IKDC did not differ between StG and QTB, SHD in both StG and QTB was lower than CON. The IKDC scores improved significantly 1 year following ACL-R for both graft types. CONCLUSION One year after ACL-R, muscle strength is affected by autograft type, with StG leading to impairments of KE and KF muscle strength, while QTB results in more pronounced impairments of KE only. Functional capacity and patient-reported outcome were unaffected by autograft type, with the former showing impairment compared to healthy controls. CLINICAL TRIALS REGISTRATION NUMBER NCT02173483.
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Dauty M, Menu P, Mesland O, Fouasson-Chailloux A. Arthrogenic muscle inhibition and return to sport after arthrofibrosis complicating anterior cruciate ligament surgery. Eur J Sport Sci 2021; 22:627-635. [PMID: 33487103 DOI: 10.1080/17461391.2021.1881620] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Arthrofibrosis is a devastating complication after Anterior Cruciate Ligament reconstruction (ACLr) characterized by a muscle weakness secondary to an arthrogenic muscle inhibition process. The loss of knee isokinetic strength due to arthrogenic muscle inhibition may be more important after arthrofibrosis, compared to an ACLr population with no complication. The isokinetic strength deficit [Limb Symmetry Index (LSI) at 60 and 180°/s of angular speed] was measured at 4, 7 and 12 post-operative months. Knee function, return to running and return to sport were evaluated. A comparison of the Quadriceps and the Hamstring LSI between patients with arthrofibrosis and those without post-operative complication was performed according to time and taking into consideration the type of surgical procedure. 539 primary ACLr patients were assessed. The arthrofibrosis group presented at 4, 7 and 12 post-operative months a Quadriceps LSI significantly lower compared to the control group, without influence of the graft procedure (LSI: 38, 53, 68% vs 63, 73, 85% at 60°/s, respectively). The Hamstring LSI was significantly lower at 4 and 7 post-operative months, but comparable at 12 months with an influence of the Hamstring procedure. Knee function was significantly lower at 4 and 7 post-operative months. Few arthrofibrosis ACLr patients returned to running at 7 post-operative months (6.8% vs 69.9%; p < .0001). An important and durable Quadriceps muscle weakness occurred after arthrofibrosis, whatever the type of graft procedure. This is explained by an Arthrogenic muscle inhibition which compromised the return to sport at the same level until 12 post-operative months. HighlightsAn important and durable quadriceps muscle weakness occurred after arthrofibrosis.The arthrogenic muscle inhibition was significant on the operated side independently of the type of the graft procedure.Arthrogenic muscle inhibition compromised the return to sport at the same level until 12 post-operative months.
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Affiliation(s)
- Marc Dauty
- CHU Nantes, Physical Medicine and Rehabilitation Center, University Hospital of Nantes, Nantes, France.,CHU Nantes, Service de Médecine du Sport, University Hospital of Nantes, Nantes, France.,INSERM UMR U1229/RMeS, Regenerative Medicine and Skeleton - Nantes University, Nantes, France
| | - Pierre Menu
- CHU Nantes, Physical Medicine and Rehabilitation Center, University Hospital of Nantes, Nantes, France.,CHU Nantes, Service de Médecine du Sport, University Hospital of Nantes, Nantes, France.,INSERM UMR U1229/RMeS, Regenerative Medicine and Skeleton - Nantes University, Nantes, France
| | - Olivier Mesland
- CHU Nantes, Physical Medicine and Rehabilitation Center, University Hospital of Nantes, Nantes, France.,CHU Nantes, Service de Médecine du Sport, University Hospital of Nantes, Nantes, France
| | - Alban Fouasson-Chailloux
- CHU Nantes, Physical Medicine and Rehabilitation Center, University Hospital of Nantes, Nantes, France.,CHU Nantes, Service de Médecine du Sport, University Hospital of Nantes, Nantes, France.,INSERM UMR U1229/RMeS, Regenerative Medicine and Skeleton - Nantes University, Nantes, France
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Fouasson-Chailloux A, Maugars Y, Trossaert M, Rannou F, Menu P, Vinatier C, Guicheux J, Dauty M. Isokinetic knee strength deficit in patients with moderate haemophilia. Haemophilia 2021; 27:634-640. [PMID: 33595151 DOI: 10.1111/hae.14279] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 02/02/2021] [Accepted: 02/05/2021] [Indexed: 01/01/2023]
Abstract
INTRODUCTION Knee joint bleedings are responsible for quadriceps atrophy and strength deficit in patients with severe haemophilia. Little is known about patients with moderate haemophilia (PWMH). AIM To evaluate isokinetic quadriceps and hamstrings strength in PWMH and to assess correlation with radiological and clinical parameter. METHODS 18 PWMH aged 37.1 ± 11.4 and 18 healthy age-, weight- and height-matched controls performed a knee isokinetic test at 180°/s to assess quadriceps and hamstrings strength. In the PWMH group, knee Pettersson's score was pursued and Haemophilia Joint Health Score 2.1 (HJHS) was performed to determine unaffected knees (knee HJHS = 0) and affected ones (knee HJHS >0). RESULTS Affected knees had a decrease of quadriceps strength compared to controls, 1.26 ± 0.47 vs 1.64 ± 0.27 Nm/kg and a decrease of hamstring strength, 0.60 ± 0.29 vs 1.03 ± 0.21 Nm/kg, (P < 0.001). Unaffected knees also had a decrease of quadriceps strength compared to controls, 1.36 ± 0.31 vs 1.64 ± 0.27 Nm/kg and a decrease of hamstring strength, 0.69 ± 0.18 vs 1.03 ± 0.21 Nm/kg, (P < 0.001). The conventional hamstring-to-quadriceps ratio was significantly decreased in affected knees compared to controls, 0.46 ± 0.15 vs 0.64 ± 0.13 (P < 0.001) but also in unaffected knees, 0.53 ± 0.16 vs 0.64 ± 0.13 (P = 0.02).No correlation was found between strength and HJHS or Pettersson's score. CONCLUSION PWMH have a significant knee strength deficit, both on the quadriceps and the hamstrings, which is responsible for an important muscle imbalance.
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Affiliation(s)
- Alban Fouasson-Chailloux
- INSERM, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, Nantes, France.,Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes, France.,Service de Médecine du Sport, CHU Nantes, Nantes, France.,Université de Nantes, UFR Odontologie, Nantes, France
| | - Yves Maugars
- INSERM, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, Nantes, France.,Université de Nantes, UFR Odontologie, Nantes, France.,Service de Rhumatologie, CHU Nantes, Nantes, France
| | - Marc Trossaert
- Centre Régional de Traitement de l'Hémophilie, CHU Nantes, Nantes, France
| | - François Rannou
- Service de Rééducation et de Réadaptation de l'Appareil Locomoteur et des Pathologies du Rachis, Hôpitaux Universitaires-Paris Centre, Groupe Hospitalier Cochin, Assistance Publique - Hôpitaux de Paris, France.,INSERM UMRS 1124, Toxicité Environnementale, Cibles Thérapeutiques, Signalisation Cellulaire et Biomarqueurs, UFR Sciences Fondamentales et Biomédicales, Sorbonne Paris Cité, Paris, France
| | - Pierre Menu
- Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes, France.,Service de Médecine du Sport, CHU Nantes, Nantes, France
| | - Claire Vinatier
- INSERM, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, Nantes, France.,Université de Nantes, UFR Odontologie, Nantes, France
| | - Jérôme Guicheux
- INSERM, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, Nantes, France.,Université de Nantes, UFR Odontologie, Nantes, France.,CHU Nantes, PHU4 OTONN, Nantes, France
| | - Marc Dauty
- INSERM, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, Nantes, France.,Service de Médecine Physique et Réadaptation Locomotrice et Respiratoire, CHU Nantes, Nantes, France.,Service de Médecine du Sport, CHU Nantes, Nantes, France.,Université de Nantes, UFR Odontologie, Nantes, France
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Lower-Limb Muscle Strength, Anterior-Posterior and Inter-Limb Asymmetry in Professional, Elite Academy and Amateur Soccer Players. J Hum Kinet 2021; 77:135-146. [PMID: 34168699 PMCID: PMC8008310 DOI: 10.2478/hukin-2020-0058] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Given the importance of the lower-limb strength and strength balance in soccer players and its relationship with injury prevention and performance, the present study compared quadriceps and hamstrings strength, the conventional (Hconc:Qconc), functional (Hecc:Qconc) hamstrings-to-quadriceps ratio and inter-limb strength asymmetry in professional, elite academy and amateur male soccer players. In this cross-sectional study, two hundred-six soccer players (professional = 75, elite academy = 68, amateurs = 63) volunteered to participate. Quadriceps and hamstrings isokinetic peak torque was investigated at 60° .s-1 in both the concentric and eccentric modality and at 300°.s-1 in the concentric modality. The conventional Hconc:Qconc, functional Hecc:Qconc ratio and quadriceps and hamstrings inter-limb strength asymmetry were then calculated. Professional players presented greater quadriceps and hamstrings strength than elite academy (effect size from small to moderate) and amateur players (moderate to very large). Both the conventional Hconc:Qconc and functional Hecc:Qconc ratio were greater in professional than elite academy and amateur players (small to moderate). Overall, quadriceps and hamstrings inter-limb strength asymmetry was greater in amateurs than professional (small to very large) and elite academy (trivial to large) players. The present findings provide coaches and medical staffs with normative lower-limb muscle strength data on professional, academy and amateur soccer players. Overall lower-limb muscle strength and inter-limb strength asymmetry could be used to evaluate possible inference on injury prevention and performance. The hamstrings-to-quadriceps ratio poorly differentiates between the soccer players background and offers limited prediction for injury prevention and performance.
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Oshima T, Nakase J, Inaki A, Mochizuki T, Takata Y, Shimozaki K, Kinuya S, Tsuchiya H. Comparison of muscle activity, strength, and balance, before and after a 6-month training using the FIFA11+ program (part 2). J Orthop Surg (Hong Kong) 2020; 28:2309499019891541. [PMID: 31876250 DOI: 10.1177/2309499019891541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Sports injury prevention training programs have been reported to be effective in decreasing the incidence of injuries. The aim of this study was to evaluate the effects of a 6-month training period, using part 2 of the FIFA11+ program (the Fédération Internationale de Football), on the activation and strength of core and lower limb muscles and on static and dynamic balance performance. STUDY DESIGN Case series; level of evidence, 4. METHODS Eight college male soccer players, aged mean 20.4 ± 0.5 years old, completed the FIFA11+ program at least three times per week for 6 months. The following variables were measured both before and after the 6-month training program: activities of more than 30 muscles (core and lower limb muscles), measured using the standardized uptake values of 18F-fluorodeoxyglucose on positron emission tomography; isokinetic strength of the knee flexor and extensor and hip abductor muscles, measured at 60° s-1; static balance over a 60-s period, measured using a gravicorder; and dynamic balance, measured using the star excursion balance test. RESULTS Training improved the activity levels of core (obliquus externus abdominis and erector spinae) and lower limb (tibialis anterior) muscles (p ≤ 0.03), corrected the between-limb difference in the activation of the semimembranosus and improved dynamic balance, with a greater training effect on the nondominant limb (p ≤ 0.02). Training also improved the knee flexor force of the nondominant lower limb (p = 0.02). CONCLUSION Routine performance of the FIFA11+ program can improve the activation of core and lower limb muscles, with a concomitant improvement in dynamic balance. These improvements could be beneficial in lowering the risk of sports-related injuries.
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Affiliation(s)
- Takeshi Oshima
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | - Junsuke Nakase
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | - Anri Inaki
- Department of Nuclear Medicine/Biotracer Medicine, Graduate School of Medical Science Kanazawa University, Kanazawa, Japan
| | | | - Yasushi Takata
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | - Kengo Shimozaki
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | - Seigo Kinuya
- Department of Nuclear Medicine/Biotracer Medicine, Graduate School of Medical Science Kanazawa University, Kanazawa, Japan
| | - Hiroyuki Tsuchiya
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
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The Effects of a Soccer-Specific Fitness Test on Eccentric Knee Flexor Strength. J Sport Rehabil 2020; 30:568-572. [PMID: 33217730 DOI: 10.1123/jsr.2019-0532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 05/07/2020] [Accepted: 08/22/2020] [Indexed: 11/18/2022]
Abstract
CONTEXT Physiological fitness testing, such as the Yo-Yo Intermittent Recovery Test (YYIR) is a key requirement of the Elite Player Performance Plan, introduced by the English Premier League. Eccentric hamstring strength has been identified as a risk factor for hamstring injuries in soccer players, with fatigue highlighted to further exasperate this issue. OBJECTIVE The aim of the current study was to examine the effect of the YYIR level 1 (YYIR1) on eccentric knee flexor strength assessed using the NordBord in youth soccer players. DESIGN Experimental design. SETTING Soccer club academy. PARTICIPANTS A total of 67 male academy soccer players (age = 16.58 [0.57] y; height = 175.45 [5.85] cm; mass = 66.30 [8.21] kg) volunteered to participate in the current study during the English competitive soccer season. MAIN OUTCOME MEASURES Participants conducted eccentric hamstring strength assessments using the NordBord prior to and immediately postcompletion of the YYIR1, with outcome measures of peak force and peak force relative to body mass recorded. RESULTS Paired t tests highlighted increased absolute eccentric knee flexor strength values (P < .001) immediately post-YYIR1 for both the dominant and nondominant limbs, with the same trend (P < .001) observed for eccentric strength relative to body mass. CONCLUSIONS The results of this study indicate that the YYIR1 does not induce eccentric knee flexor fatigue and as such is not a valid assessment method to assess the effects of fatigue on hamstring function. However, results do suggest that the NordBord may be considered a viable and more accessible alternative to detect pre-post fitness test/fatigue protocol differences in eccentric knee flexor peak strength while working in the field.
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