Table 3.
Mean (SD) minutes per day of MVPA at T1 and mean change in MVPA by age group and sex
| Time period | Children | Adolescents | ||||||
|---|---|---|---|---|---|---|---|---|
| MVPA at T1 (mean min/day, SD) | Change in MVPA (mean min/day, SD) | MVPA at T1 (mean min/day, SD) | Change in MVPA (mean min/day, SD) | |||||
| Boys | Girls | Boys | Girls | Boys | Girls | Boys | Girls | |
| Before school | 23.9 (11.3)****** | 20.7 (10.9)****** | −8.6 (11.2)***** | −8.2 (9.5)****** | 11.1 (6.6) | 8.3 (5.4)** | −4.0 (6.7) | −2.4 (5.7) |
| After school | 43.1 (13.5)****** | 42.3 (14.4)****** | −16.4 (15.9) | −22.4 (15.9)*, ****** | 27.2 (15.7) | 20.0 (10.4)*** | −11.4 (16.1) | −9.1 (10.6) |
| Evenings | 27.7 (11.9)****** | 30.5 (13.6)****** | −12.3 (12.7)**** | −16.4 (14.3)****** | 12.0 (9.8) | 10.3 (7.9) | −7.5 (10.0) | −6.1 (7.9) |
| Nonschool hours (weekdays) | 94.7 (25.3)****** | 93.5 (31.5)****** | −37.4 (28.2)***** | −47.0 (29.9)****** | 50.9 (23.0) | 38.2 (16.1)*** | −24.1 (21.5) | −17.1 (15.3)* |
| Weekends | 167.3 (79.5)****** | 161.6 (78.2)****** | −46.0 (94.7) | −70.7 (81.5)****** | 71.8 (45.5) | 47.5 (35.4)*** | −36.9 (50.8) | −18.7 (40.1)** |
*p < 0.05, **p < 0.01, ***p < 0.001: independent samples t test—significant differences between boys and girls within age group; ****p < 0.05, *****p < 0.01, ******p < 0.001: independent samples t test—significant differences between age groups within sex