Table 1.
Baseline characteristics of the study participants (N=496). Values are mean (standard deviation) unless otherwise specified. N values for the baseline moderate to vigorous physical activity and sedentary time were 87 and 80 for the intervention and control groups, respectively.
| Variable | Intervention (n=250) | Control (n=246) |
| Age, in years | 17.9 (0.7) | 17.8 (0.6) |
| Student, n (%) | 218 (92.7) | 214 (92.2) |
| Height, cm | 177.9 (6.7) | 178.1 (6.0) |
| Weight, kg | 73.4 (15.0) | 72.9 (14.0) |
| BMIa, kg/m2 | 23.2 (4.5) | 23.0 (4.2) |
| Waist circumference, cm | 81.9 (10.9) | 81.9 (10.1) |
| Body fat, % | 16.5 (8.5) | 16.7 (8.3) |
| Muscle mass, % | 47.1 (4.9) | 46.9 (4.9) |
| Grip strength (mean), kg | 45.6 (8.1) | 45.6 (7.3) |
| Estimated maximal aerobic fitness, mL/min/kg | 53.6 (7.3) | 53.0 (6.8) |
| Daily moderate to vigorous physical activityb at baseline, min | 59.6 (26.2) | 61.9 (27.0) |
| Daily sedentary time at baseline, h | 10.4 (2.1) | 10.3 (1.9) |
| At the action or maintenance stage of physical activityc adaption, n (%) | 167 (74.2) | 152 (68.2) |
| Current smoker, n (%) | 45 (19.6) | 48 (21.3) |
| At least 6 servings of alcohol ≥ once a week, n (%) | 43 (20.3) | 43 (19.2) |
aBMI: body mass index.
bMVPA: moderate to vigorous physical activity.
cPA: physical activity.