Relationship between external workloads and risk of injury in elite rugby league players
| Risk factors | Relative risk (95% CI) | ||
|---|---|---|---|
| Transient | Time lost | Missed matches | |
| Injury history in the previous season (no vs yes) | 1.4 (0.6 to 2.8) | 0.7 (0.4 to 1.4) | 0.9 (0.2 to 4.1) |
| Total distance (≤3910 vs >3910 m) | 0.6 (0.3 to 1.4) | 0.5 (0.2 to 1.1) | 1.1 (0.2 to 6.0) |
| Very low intensity (≤542 vs >542 m) | 0.6 (0.2 to 1.3) | 0.4 (0.2 to 0.9)* | 0.4 (0.1 to 2.8) |
| Low intensity (≤2342 vs >2342 m) | 0.5 (0.2 to 1.1) | 0.5 (0.2 to 0.9)* | 1.2 (0.2 to 5.5) |
| Moderate intensity (≤782 vs >782 m) | 0.4 (0.2 to 1.1) | 0.5 (0.2 to 1.0) | 0.5 (0.1 to 2.3) |
| High intensity (≤175 vs >175 m) | 0.8 (0.2 to 3.1) | 0.9 (0.3 to 3.4) | 2.9 (0.1 to 16.5) |
| Very high intensity (≤9 vs >9 m) | 2.7 (1.2 to 6.5)* | 0.7 (0.3 to 1.6) | 0.6 (0.1 to 3.1) |
| Total high intensity (≤190 vs >190 m) | 0.5 (0.1 to 2.1) | 1.8 (0.4 to 7.4) | 0.7 (0.1 to 30.6) |
| Mild acceleration (≤186 vs >186 m) | 0.2 (0.1 to 0.4)† | 0.5 (0.2 to 1.1) | 1.5 (0.3 to 8.6) |
| Moderate acceleration (≤217 vs >217 m) | 0.3 (0.1 to 0.6)† | 0.4 (0.2 to 0.9)* | 1.4 (0.3 to 7.5) |
| Maximum acceleration (≤143 vs >143 m) | 0.4 (0.2 to 0.8)* | 0.5 (0.2 to 0.9)* | 1.8 (0.4 to 8.8) |
| Repeated high-intensity effort bouts (≤3 vs >3 bouts) | 0.9 (0.4 to 2.0) | 1.6 (0.8 to 3.3) | 1.0 (0.2 to 4.4) |
All injuries were classified as a transient (no training missed), time loss (any injury resulting in missed training) or a missed match (any injury resulting in a subsequent missed match) injury. *p<0.05; †p<0.01.
Reproduced from Gabbett and Ullah.26