Number of bowlers, total number of balls bowled, and grade III or IV fast bowling injuries in four groups
| Bowling group | No of bowlers | Total balls bowled in study | No of grade III or IV injuries | Grade III or IV injuries per 1000 balls |
|---|---|---|---|---|
| <1000 balls | 15 | 11628 | 3 | 0.258 |
| 1000–2000 balls | 32 | 50847 | 12 | 0.236 |
| 2000–3000 balls | 14 | 34013 | 5 | 0.147 |
| >3000 balls | 9 | 44776 | 3 | 0.067 |
| All | 70 | 141264 | 23 | 0.163 |