Table 1.

Characteristics of the Analytical Sample Stratified by Sex, Time-period, and Time-point, Mean ± SD

	Boys
	School			Afterschool			Evening
	T0 (N=350)	T1 (N=348)	T2 (N=349)	T0 (N=338)	T1 (N=336)	T2 (N=337)	T0 (N=275)	T1 (N=273)	T2 (N=274)
Age	10.6±0.5	11.5±0.5	12.5±0.5	10.6±0.5	11.5±0.5	12.5±0.5	10.6±0.6	11.5±0.5	12.5±0.5
TPA (min/h)	25.3±5.8	21.6±5.1	20.0±4.7	33.2±6.6	31.9±6.7	30.5±10.1	29.9±7.2	27.9±8.1	27.5±10.1
MVPA (min/h)	2.7±1.7	2.2±1.2	2.3±1.3	4.5±3.4	4.8±3.7	5.3±8.4	4.2±4.0	4.5±5.6	4.9±8.1
	Girls
	School			Afterschool			Evening
	T0 (N=418)	T1 (N=413)	T2 (N=417)	T0 (N=413)	T1 (N=408)	T2 (N=412)	T0 (N=337)	T1 (N=333)	T2 (N=336)
Age	10.6±0.5	11.5±0.5	12.5±0.5	10.6±0.5	11.5±0.5	12.5±0.5	10.6±0.6	11.5±0.5	12.5±0.5
TPA (min/h)	23.8±5.1	18.5±4.7	17.3±4.4	31.5±6.2	29.1±6.2	27.0±7.5	28.2±6.3	25.1±6.2	22.6±6.2
MVPA (min/h)	1.8±1.0	1.3±0.8	1.4±4.4	2.6±1.9	2.7±1.9	3.1±4.6	2.5±2.0	2.2±2.6	1.6±1.7

Note.

MVPA=moderate-to-vigorous physical activity; TPA=total physical activity