Cardiorespiratory fitness and body mass index of Nigerian youth: A FitnessGram-based assessment

Table 1 Participants’ descriptive data for the progressive aerobic cardiovascular endurance run and Body mass index (n = 3225)

	n	Progressive aerobic cardiovascular endurance run (mL/kg/minutes)			Body mass index (kg/m2)
		Mean	SD	%Pass (95%CI)	Mean	SD	%Pass (95%CI)
Age (boys)
9	126	47.1	16.9	95.2 (91.3-98.4)	17.4	3.3	95.2 (91.3-98.4)
10	161	46.6	14.4	93.2 (88.8-96.9)	18.2	3.1	88.8 (83.9-93.8)
11	198	46.4	16.1	90.9 (86.9-94.9)	18.3	4.4	96.0 (92.9-98.5)
12	276	45.9	14.7	86.6 (82.6-90.6)	18.5	3.7	94.6 (91.7-97.1)
13	265	44.7	17.1	80.8 (75.8-85.3)	18.7	3.6	95.5 (92.8-97.7)
14	244	43.6	15.9	73.3 (67.6-78.7)	19.5	3.9	97.1 (94.7-98.8)
15	155	43.9	17.8	71.0 (63.9-78.1)	19.5	4.2	95.5 (91.6-98.7)
16	97	43.1	19.5	68.1 (57.7-77.3)	19.5	4.1	88.7 (81.4-94.8)
Age (girls)
9	118	44.9	10.5	98.3 (95.8-100.0)	17.0	2.5	100.0 (100.0-100.0)
10	184	45.5	18.0	97.8 (95.7-99.5)	17.7	3.2	97.3 (94.6-99.5)
11	230	43.7	16.2	94.8 (91.7-97.4)	18.8	3.7	96.1 (93.5-98.3)
12	313	43.6	16.6	84.3 (80.2-88.5)	18.5	3.0	96.2 (93.9-98.1)
13	302	42.6	17.8	78.8 (74.2-83.1)	19.2	3.6	96.4 (94.0-98.3)
14	259	41.7	18.0	64.5 (58.7-70.3)	19.7	3.7	96.1 (93.8-98.5)
15	192	41.8	20.0	59.2 (52.4-66.5)	20.1	3.9	99.8 (98.4-100.0)
16	105	38.9	14.2	41.0 (31.4-50.5)	20.2	4.6	96.2 (92.4-99.0)

Table 2 FitnessGram criterion-reference standards for progressive aerobic cardiovascular endurance run and body mass index (2017 revised standards)

Age	Progressive aerobic cardiovascular endurance run (mL/kg/minutes)		Body mass index (kg/m2)
	Boys	Girls	Boys	Girls
9	-	-	18.9	19.4
10	40.2	40.2	19.7	20.3
11	40.2	40.2	20.5	21.2
12	40.3	40.1	21.3	22.1
13	41.1	39.7	22.2	22.9
14	42.5	39.4	23.0	23.6
15	43.6	39.1	23.7	24.3
16	44.1	38.9	24.5	24.8

Table 3 The odds of meeting Healthy Fitness Zone in aerobic capacity and body mass index

Outcome variable	Predictor	Group	Odds ratio	95%CI	P value
Aerobic capacity	Age	Adolescent	1	0.58-1.32	0.534
		Child	0.88
	Sex	Male	1
		Female	1.87	1.31-2.67	0.001
Body mass index	Age	Adolescent	1
		Child	4.97	3.63-6.81	< 0.001
	Sex	Male	1
		Female	0.82	0.68-0.99	0.042