| Intervention Group(1) | Control Group(0) | P | All |
---|---|---|---|---|
Age in years, mean (SE) | 13.71 ± 0.04 | 13.48 ± 0.02 | 0.3512 | 13.60 ± 0.02 |
Physical activity* (n = 1199) | Â | Â | Â | Â |
   Counts per minute, mean (SE) | 428.40 ± 5.50 | 418.44 ± 5.22 | 0.2367 | 423.14 ± 3.79 |
   Percentage time sedentary intensity | 60.07 ± 0.32 | 61.22 ± 0.28 | 0.1210 | 60.83 ± 0.21 |
   Percentage time light intensity | 34.95 ± 0.27 | 33.95 ± 0.24 | 0.0655 | 34.26 ± 0.19 |
   Percentage time moderate intensity | 4.51 ± 0.08 | 4.32 ± 0.08 | 0.1482 | 4.38 ± 0.06 |
   Percentage time vigorous intensity | 0.455 ± 0.02 | 0.512 ± 0.02 | 0.6826 | 0.476 ± 0.01 |
   Percentage time moderate-to-vigorous activity | 4.97 ± 0.09 | 4.83 ± 0.09 | 0.3184 | 4.86 ± 0.06 |
   Percentage of participants meeting recommended 60 mins of MVPA every day | 1.9 | 1.1 | 0.253 | 1.5 |
   Percentage of participants meeting recommended 60 mins of MVPA per day on average | 10.6 | 9.6 | 0.682 | 10.1 |
Physical self-worth (n = 1467) | 16.04 ± 0.14 | 16.40 ± 0.14 | 0.1798 | 16.22 ± 0.10 |
Sports competence (n = 1465) | 15.42 ± 0.14 | 15.70 ± 0.13 | 0.2739 | 15.56 ± 0.10 |
Physical condition (n = 1468) | 16.04 ± 0.14 | 16.38 ± 0.14 | 0.1389 | 16.21 ± 0.10 |
Body attractiveness (n = 1462) | 14.02 ± 0.14 | 14.39 ± 0.15 | 0.2748 | 14.21 ± 0.10 |
Physical strength (n = 1461) | 15.09 ± 0.13 | 15.35 ± 0.12 | 0.2002 | 15.22 ± 0.09 |
Physical activity confidence (n = 1510) | 29.74 ± 0.16 | 29.88 ± 0.17 | 0.4675 | 29.81 ± 0.12 |
Enjoyment of physical activity (n = 1503) | 29.77 ± 0.16 | 29.63 ± 0.16 | 0.5504 | 29.70 ± 0.12 |
Enjoyment of school sport (n = 1510) | 28.06 ± 0.19 | 27.40 ± 0.20 | 0.0641 | 27.74 ± 0.14 |
Social support for physical activity (n = 1510) | 12.54 ± 0.10 | 12.02 ± 0.11 | 0.0768 | 12.29 ± 0.08 |
Social support during school sport (n = 1503) | 23.83 ± 0.16 | 23.65 ± 0.16 | 0.6594 | 23.75 ± 0.11 |
Strategies to increase physical activity (n = 1509) | 25.32 ± 0.18 | 24.93 ± 0.19 | 0.3935 | 25.13 ± 0.13 |
School physical activity environment (n = 1508) | 26.26 ± 0.16 | 25.88 ± 0.16 | 0.6952 | 26.07 ± 0.11 |
Perceived importance of physical activity (n = 1459) | 22.42 ± 0.15 | 22.39 ± 0.15 | 0.8685 | 22.41 ± 0.11 |