TABLE 1.

Descriptives at baseline (M1)

	Boys (n = 462)		Girls (n = 508)		Total (n = 970)		t test (boys‐girls)
	n	Mean ± SD	n	Mean ± SD	n	Mean ± SD	P‐value
Age (y)	462	12.6 ± 1.3	507	12.5 ± 1.3	969	12.5 ± 1.3	.605
Height (cm)	429	156.7 ± 11.3	485	155.5 ± 9.5	914	156.1 ± 10.4	.090
Weight (kg)	429	46.5 ± 12.7	485	46.5 ± 10.6	914	46.5 ± 11.6	.978
BMI (kg/m2)	429	18.6 ± 3.3	485	19.1 ± 3.2	914	18.9 ± 3.2	.054
BodyFat (%)	429	15.3 ± 8.2	485	21.2 ± 7.5	914	18.4 ± 8.4	<.001
Shuttle‐run (count)	410	47.5 ± 20.3	461	37.0 ± 15.9	871	41.9 ± 18.9	<.001