Acute effects of static stretching on peak and end-range hamstring-to-quadriceps functional ratios

Table 1 Peak and end range muscle strength of the quadriceps before and after stretching intervention (mean ± SD)

	Control		Static
	Before	After	Before	After
ConPT60 (Nm)	226 ± 49	223 ± 51	229 ± 49	210 ± 52b
ConPT60-ERE (Nm)	145 ± 46	148 ± 46	160 ± 43	136 ± 36b
ConPT180 (Nm)	134 ± 29	133 ± 28	131 ± 29	119 ± 28b
ConPT180-ERE (Nm)	103 ± 26	102 ± 26	104 ± 27	89 ± 24b
EccPT60 (Nm)	266 ± 79	269 ± 76	273 ± 76	246 ± 70b
EccPT180 (Nm)	234 ± 66	236 ± 63	246 ± 56	224 ± 51b

^bP < 0.01 (following stretching). Ecc: Eccentric; Con: Concentric; PT: Peak torque; ERE: End-range of knee extension; Nm: Newton-meter; 60: 60°/s angular velocity; 180: 180°/s angular velocity.

Table 2 Peak and end range muscle strength of the hamstring before and after stretching intervention (mean ± SD)

	Control		Static
	Before	After	Before	After
ConPT60 (Nm)	150 ± 34	152 ± 34	157 ± 32	145 ± 29b
ConPT180 (Nm)	105 ± 22	106 ± 23	110 ± 26	101 ± 23b
EccPT60 (Nm)	161 ± 52	160 ± 47	162 ± 44	144 ± 42b
EccPT60-ERE (Nm)	156 ± 53	157 ± 48	155 ± 50	139 ± 48b
EccPT180 (Nm)	161 ± 44	161 ± 43	162 ± 49	139 ± 44b
EccPT180-ERE (Nm)	154 ± 47	155 ± 46	156 ± 56	132 ± 50b

^bP < 0.01 (following stretching). Ecc: Eccentric; Con: Concentric; PT: Peak torque; ERE: End-range of knee extension; Nm: Newton-meter; 60: 60°/s angular velocity; 180: 180°/s angular velocity.

Table 3 Functional hamstring-to-quadriceps muscle strength ratios for knee extension during the entire and end range before and after stretching intervention in the two groups (mean ± SD)

	Control		Static
	Before	After	Before	After
ER-Ext-60	1.10 ± 0.28	1.09 ± 0.26	1.00 ± 0.32	1.07 ± 0.41
ER-Ext-180	1.51 ± 0.40	1.54 ± 0.38	1.54 ± 0.61	1.51 ± 0.60
Ext-60	0.70 ± 0.17	0.72 ± 0.14	0.72 ± 0.16	0.71 ± 0.18
Ext-180	1.21 ± 0.27	1.21 ± 0.24	1.25 ± 0.39	1.20 ± 0.36

ER: End range; Ext: Extension; 60: 60°/s angular velocity; 180: 180°/s angular velocity.