Table 1: Characteristics of the participants.
| Mean | SD |
| Age (years) | 19.7 | 1.4 |
| Height (cm) | 159.3 | 5.5 |
| Bodyweigth (kg) | 51.6 | 8.2 |
| BMI | 20.3 | 2.6 |
| Weight of objects (g) | 5310.6 | 1995.5 |
| One-way commuting time to college (minutes) | 37.7 | 32.9 |
| Average hours of part-time work on weekdays(hours) | 5.3 | 24.0 |
| Average hours worked part-time on holidays(hours) | 4.4 | 3.3 |
| n | % |
| Gender | Female | 116 | 94.3 |
| Male | 7 | 5.7 |
| Commuting | Bus/train | 62 | 50.4 |
| Private car/motorbike | 21 | 17.1 |
| Walking | 40 | 32.5 |
| Part-time job | Yes | 91 | 74.0 |
| No | 32 | 26.0 |
| Dailyfootwear | Sneakers | 104 | 84.6 |
| Ballet shoes/flat shoes | 11 | 8.9 |
| Sandals (without heel strap) | 5 | 4.1 |
| Sandals with heels | 3 | 2.4 |
| Carried objects | Backpack | 89 | 63.1 |
| Tote-bag | 49 | 34.8 |
| Hand-held bag | 3 | 2.1 |
| Difference which one when carried tote-bag | Right shoulder | 28 | 57.1 |
| Left shoulder | 21 | 42.9 |