Football-specific variables recorded for 33 non-contact and indirect contact ACL injury cases analysed using systematic video analysis
| Playing situation | Field location | Player action | Duel type | Player contact preceding injury | Player contact at injury | |
|---|---|---|---|---|---|---|
| Pressing | ||||||
| 11 cases | Defense (n=11) | Defensive third (n=2) Midfield zone 1 (n=3) Midfield zone 2 (n=4) Offensive third (n=2) | No ball possession (n=11) | Pressing (n=11) | No (n=11) | No (n=10) Indirect, to trunk/arm (n=1) |
| Kicking | ||||||
| 5 cases | Offense (n=2) Defense (n=3) | Defensive third (n=1) Midfield zone 1 (n=2) Offensive third (n=2) | Passing (n=1) Shooting (n=1) Clearing (n=3) | No duel (n=2) Tackled by other player (n=2) Other (n=1) | No (n=2) Direct, to injured leg (n=1) Indirect, to uninjured leg (n=1) Indirect, to trunk/arm (n=1) | No (n=3) Indirect, to trunk/arm (n=2) |
| Heading | ||||||
| 5 cases | Offense (n=1) Defense (n=4) | Defensive third (n=2) Midfield zone 1 (n=2) Offensive third (n=1) | Heading (n=5) | No duel (n=3) Heading duel (n=2) | No (n=3) Indirect, to trunk/arm (n=2) | No (n=5) |
| Other | ||||||
| 12 cases | Offense (n=4) Defense (n=8) | Defensive third (n=6) Midfield zone 1 (n=3) Offensive third (n=3) | Dribbling (n=1) Receiving (n=2) Screening (n=1) No ball possession (n=8) | No duel (n=5) Collision (n=1) Tackled by other player (n=1) Screening (n=1) Running (n=4) | No (n=5) Direct, to injured leg (n=1) Indirect, to uninjured leg (n=1) Indirect, to trunk/arm (n=4) Combined* (n=1) | No (n=7) Indirect, to trunk/arm (n=5) |
*Player contact both to the trunk/arm and injured leg.
ACL, anterior cruciate ligament.