Table 1 Frequency of video-verified impacts by game time and playing position
|  |  | Video-verified | Sensor-recorded 10 g+ | Sensor-recorded 10 g to < 20 g | Sensor-recorded ≥ 20 g | Sensor-recorded and video-verified ≥ 20 g | Sensor-recorded and video-verified 10 g to < 20 g | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Â | Playing hours (min) | Game impacts (n) | Impacts per game hour (n) | Game impacts (n) | Impacts per game hour (n) | Game impacts (n) | Impacts per game hour (n) | Game impacts (n) | Impacts per game hour (n) | Game impacts (n) | Impacts per game hour (n) | Game impacts (n) | Impacts per game hour (n) |
1st half | 44.6 (2673) | 1545 | 34.6 | 1632 | 36.6 | 1249 | 28.0 | 383 | 8.6 | 370 | 8.3 | 768 | 17.2 |
2nd half | 44.6 (2673) | 1452 | 32.6 | 1540 | 34.5 | 1144 | 25.7 | 396 | 8.9 | 362 | 8.1 | 680 | 15.2 |
Forwards | 35.3 (2117) | 1716 | 48.6 | 1323 | 37.5 | 902 | 25.6 | 421 | 11.9 | 407 | 11.5 | 798 | 22.6 |
Backs | 53.8 (3229) | 1281 | 23.8 | 1849 | 34.4 | 1491 | 27.7 | 358 | 6.7 | 325 | 6.0 | 650 | 12.1 |
Total sample | 89.1 (5346) | 2997 | 33.6 | 3172 | 35.6 | 2393 | 26.9 | 779 | 8.7 | 732 | 8.2 | 1448 | 16.3 |