High speed ball impact percent difference for headgears relative to bare head
| Headgear | Ball speed (m/s) | Peak linear accel. % diff. | HIPmax % diff. |
|---|---|---|---|
| accel., acceleration; diff., difference; HIPmax, maximum Head Impact Power. | |||
| A | 10 | −1.3 | −12.4 |
| 20 | −10.7 | −8.7 | |
| 30 | 8.0 | 11.6 | |
| B | 10 | −7.3 | −15.6 |
| 20 | 0.1 | 0.3 | |
| 30 | −0.5 | −9.9 | |
| C | 10 | −3.4 | −13.5 |
| 20 | −5.3 | 7.3 | |
| 30 | 5.9 | 25.9 | |
| Mean | −1.6 | −1.7 | |
| SD | 6.0 | 14.1 | |
| 95% CI± | 3.9% | 9.2% | |