Table 4.
Preparation and influencing factors for ACL injuries in football players (n = 2875)
| Variable | Total | Male | Female |
|---|---|---|---|
| % | % | % | |
| Club change for this season | |||
| Yes | 11.8 | 11.5 | 12.2 |
| No | 88.2 | 88.5 | 87.8 |
| Division change this season | |||
| No | 77 | 79.3 | 73.3 |
| Yes, to a higher | 14.6 | 11.5 | 19.7 |
| Yes, to a lower | 8.4 | 9.2 | 7 |
| Coach change | |||
| No | 72.3 | 75.5 | 67.3 |
| During the season | 17.3 | 15.2 | 20.8 |
| Before the season | 10.4 | 9.4 | 11.9 |
| Weight change previous 3 months | |||
| About the same | 78.9 | 77 | 81.9 |
| Gained weight | 7.2 | 7.6 | 6.6 |
| Lost weight | 13.9 | 15.4 | 11.4 |
| New football shoes last month | |||
| Yes | 11.8 | 13 | 10 |
| No | 88.2 | 87 | 90 |
| Shoe type at time of injury | |||
| Firm ground—permanent studs | 62.4 | 63.5 | 60.6 |
| Soft ground—screw-in studs | 1.8 | 2.6 | 0.5 |
| Artificial grass | 19.7 | 16.8 | 24.4 |
| Indoor | 6.3 | 7.2 | 4.9 |
| Other | 9.8 | 10 | 9.5 |
| Weather conditions | |||
| Sun | 42.5 | 41.5 | 44 |
| Cloudy | 29.3 | 29.7 | 28.5 |
| Rain | 6.8 | 6.9 | 6.7 |
| Snow | 3.7 | 3.9 | 3.4 |
| Other | 17.7 | 17.9 | 17.3 |
| Games played in the previous 7 days | |||
| 0 | 37.3 | 35.2 | 40.9 |
| 1 | 50.4 | 49.4 | 52 |
| 2 or more | 12.3 | 15.3 | 7.1 |
| Warm up using knee control exercises | |||
| Yes | 21.7 | 15.6 | 31.4 |
| No | 78.3 | 84.4 | 68.6 |
| Previous injury | |||
| ACL | 15.5 | 14 | 17.9 |
| PCL | 1.2 | 1.2 | 1.2 |
| Symptoms or injury in the last 6 weeks before the ACL injury | |||
| Yes | 19.8 | 18.7 | 21.6 |
| No | 80.2 | 81.3 | 78.4 |
| Distribution of symptoms and injuries per body part | |||
| Head | 4.2 | 2.7 | 6.2 |
| Neck | 2.5 | 1.5 | 3.8 |
| Back | 18.9 | 19.4 | 18.3 |
| Groin | 14 | 16.1 | 11.3 |
| Hip | 9.3 | 7.9 | 11.3 |
| Thigh | 16 | 13.6 | 19.2 |
| Knee | 60 | 62.7 | 56.3 |
| Ankle/foot | 25.4 | 23.6 | 27.9 |