Participant characteristics (n=19)
| Characteristic | Value |
| Age, years* | 29.42±6.552 |
| Years playing roller derby* | 2.75±2.9 |
| Hours of roller derby per week* | 1.882±1.1315 |
| Hours of other physical activity per week, n (%) | |
| None | 1 (5) |
| Once a week | 4 (21) |
| Twice a week | 2 (11) |
| Three times a week | 4 (21) |
| Four times a week | 4 (21) |
| Five times a week | 4 (21) |
| Roller derby injury, n (%) | |
| Yes | 14 (73.7) |
| No | 5 (26.3) |
*Values are mean±SD.