Baseline characteristics of the participants (n=232)
| Characteristics | Intervention, n=115 | Control, n=117 |
| Age, mean (SD) | 44.3 (9.8) | 44.8 (9.3) |
| Gender, % (n) | ||
| Male | 68.7 (79) | 66.7 (78) |
| Female | 31.3 (36) | 33.3 (39) |
| Height, mean (SD) | 178.0 (8.2) | 178.4 (9.0) |
| Weight, mean (SD) | 72.3 (10.0) | 72.9 (12.4) |
| BMI, mean (SD) | 22.8 (2.1) | 22.8 (2.5) |
| Running experience, median (IQR) | 10.0 (5.0–21.5) | 7.0 (5.0–17.0) |
| Trail running experience, median (IQR) | 2.0 (1.5–4.0) | 3.0 (2.0–4.0) |
| Education, % (n) | ||
| Primary | 2.6 (3) | 1.7 (2) |
| Secondary | 64.3 (74) | 72.6 (85) |
| Tertiary | 33.0 (38) | 25.6 (30) |
| Current RRI, % (n) | 29.6 (34) | 21.4 (25) |
| Previous RRI, % (n) | 41.7 (48) | 41.0 (48) |
SD, standard deviation; IQR, 25%–75% IQR; BMI, body mass index; RRI, running-related injury.