A 10-Month Physical Activity Intervention Improves Body Composition in Young Black Boys

Table 2

Body Composition, CV Fitness and PA measures by Group (Means±SE).

	Baseline			Follow-up
	ATT	NATT	CON	ATT	NATT	CON
	(n = 31)	(n = 31)	(n = 44)	(n = 31)	(n = 31)	(n = 44)
BMI (kg/m^2)	20.4 (5.4)	20.3 (4.9)	20.0 (4.4)^c	20.3 (5.5)	20.7 (5.2)	20.5 (4.6)^c
Waist circ. (cm)	66.4 (11.6)	66.1 (10.8)	65.7 (9.9)	66.9 (12.1)	67.5 (12.2)	67.1 (10.3)
FM (kg)	11.6 (9.3)	12.1 (8.8)	10.5 (6.8)^c	11.3 (9.9)	12.6 (9.5)	11.4 (7.7)^c
FFM (kg)	30.8 (7.6)^a	29.2 (7.3)^b	29.1 (5.2)^c	34.1 (9.0)^a	32.7 (9.0)^b	32.6 (6.9)^c
%BF	24.4 (9.5)^a	26.4 (9.3)^b	24.5 (9.7)	22.1 (9.5)^a	25.0 (9.4)^b	23.9 (10.4)
BMC (kg)	1.28 (3.27)^a	1.22 (2.92)^b	1.20 (2.24)^c	1.45 (4.06)^a	1.40 (4.27)^b	1.36 (2.98)^c
BMD (g/cm^2)	0.89 (0.07)^a	0.89 (0.06)^b	0.89 (0.06)^c	0.94 (0.08)^a	0.94 (0.13)^b	0.92 (0.06)^c
VO2-170 (ml/kg/min)	25.5 (8.0)	22.6 (5.6)	23.4 (3.8)^c	26.8 (5.9)	24.3 (5.4)	25.9 (5.9)^c
VO2-170 (L/min)	1.02 (0.28)^a	0.90 (0.25)^b	0.91 (0.16)^c	1.18 (0.35)^a	1.06 (0.32)^b	1.10 (0.22)^c
	(n = 27)	(n = 22)	(n = 36)	(n = 28)	(n = 23)	(n = 36)
MVPA (hrs/day)	0.91 (0.14)^a	0.83 (0.13)	0.83 (0.10)	1.49 (0.12)^a	0.98 (0.13)	0.91 (0.12)

PA = physical activity; SE = standard error; ATT = boys in the intervention group who attended ≥60%; NATT = intervention boys who attended <60%; CON = control; BMI = body mass index; circ. = circumference; FM = fat mass; FFM = fat free mass; %BF = percent body fat; BMC = bone mineral content; BMD = bone mineral density; VO₂-170 = the VO₂ at a heart rate of 170 bpm during the graded treadmill test; MVPA = moderate-to-vigorous PA. Significant difference between baseline and follow-up for aATT, bNATT, and cCON groups.