Table 1. Baseline characteristics of participants in the intervention and comparison groups (mean ± standard deviation [SD], or percentages) and percentage of participants who provided valid data at 4 and 17 weeks.
| Intervention (n = 49) |
Comparison (n = 39) |
p-Value* | |
|---|---|---|---|
| Age (years) | 15.3 (1.7) | 14.4 (1.7) | 0.008 |
| Girls (%) | 38.8 | 48.7 | 0.350 |
| EE (kcal/lesson) (mean, SD) | 112.0 (34.9) | 110.3 (47.4) | 0.840 |
| WC (cm) (mean, SD) | 75.5 (7.9) | 72.7 (9.2) | 0.137 |
| BMI (kg/m2) (mean, SD) | 20.6 (1.9) | 20.9 (4.5) | 0.636 |
| BMI categories (%) | 0.119 | ||
| Normal weight | 95.6 | 84.2 | |
| Overweight | 4.4 | 7.9 | |
| Obese | 0 | 7.9 | |
| Presence ofmusculoskeletal discomfort (%) | |||
| Upper limbs | 28 | 26 | 0.846 |
| Back/spine | 36 | 26 | 0.313 |
| Lower limbs | 32 | 21 | 0.256 |
| Valid Data (%) | |||
| SenseWear | |||
| Baseline | 90.4 | 90.2 | 0.974 |
| 4-Week | 80.8 | 82.9 | 0.794 |
| 17-Week | 90.4 | 70.7 | 0.014 |
| Anthropometry | |||
| Baseline | 92.3 | 97.6 | 0.260 |
| 4-Week | 84.6 | 70.7 | 0.105 |
| 17-Week | 90.4 | 78.0 | 0.097 |
| Musculoskeletal | |||
| Baseline | 90.9 | 84 | 0.283 |
| 17-Week | 90.9 | 66 | 0.001 |
(*) Significant differences (p<0.05) are highlighted in bold.
Abbreviations: EE, energy expenditure; WC, waist circumference; BMI, body mass index