Frequency of first (new) injury reported during the study period
| Body region | Intervention | Control | ||||
| Overuse injury | Traumatic | Overuse injury | Traumatic | |||
| Gradual onset | Sudden onset | Traumatic | Gradual onset | Sudden onset | Traumatic | |
| Vertebral column | ||||||
| Head, face | 0 | 0 | 0 | 0 | 0 | 0 |
| Cervical, thoracic | 0 | 0 | 0 | 1 | 0 | 0 |
| Lumbar, pelvis, sacrum, abdomen | 1 | 0 | 0 | 2 | 0 | 0 |
| Upper extremities | ||||||
| Shoulder | 0 | 0 | 0 | 0 | 0 | 0 |
| Upper arm, elbow | 0 | 0 | 0 | 0 | 0 | 0 |
| Forearm, wrist, hand | 0 | 0 | 0 | 0 | 0 | 0 |
| Lower extremities | ||||||
| Hip, groin, thigh | 2 | 2 | 0 | 6 | 4 | 0 |
| Knee, lower leg | 3 | 1 | 0 | 10 | 2 | 0 |
| Achilles tendon, ankle, foot, toe | 3 | 2 | 0 | 4 | 3 | 0 |
| Total, n (%) | 9 (64) | 5 (36) | 0 (0) | 23 (72) | 9 (28) | 0 (0) |