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The T-factor and ACL injuries

ACL injuries are one of the most dramatical injuries in Top Sports. Typically, rehabilitation time is at least 6 months, and recidive injury is common.

Studies have shown, that if the knee position is more in front of the foot, the risk of ACL injuries increases. A recent study using video analysis found, that Eighty-five per cent of the ACL injuries in male professional football players resulted from noncontact or indirect contact mechanisms. The most common playing situation leading to injury was pressing followed by kicking and heading. Knee valgus was frequently seen regardless of the playing situation, but a
dynamic valgus collapse was rare.
Pressing action that lead to ACL tear. From A to D; The player in blue moves towards the opponent, then breaks and moves to the left with the entire load on his right leg. The hip is well ahead of the ankle-shoulder line, while the Ground Reaction Force-vector is running well behind this line.


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We use the Movement Profile from the Force Plate Jump to  recognize increased risk of knee injuries. The T-factor informs us of the way the knees are submitted to high forces, and the possibility to control a movement, including landing.

The T-factor is one of our new analysis tools. We analyzed an old Jump Test of a pro football player, who was rehabilitating in a late stadium after a knee injury, and analyzed it with the latest software. Although most test results were good, the T-factor result showed a dramatic 0,25 score, where a score of 9 and more is the norm. Unfortunately, the players sufferred an ACL injury in his first team training.
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