Anterior Cruciate Ligament injuries in soccer may occur when the femur internally rotates on an externally rotated tibia

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Such an injury in soccer commonly occurs when the athlete's knee is forcefully struck on the lateral side (often in a contact tackle situation), causing the knee to buckle medially towards a valgus knee position. In this situation, the knee flexes and the femur is internally rotated relative to the tibia, which is fixed in place by the soccer boot's studs that are anchored in the turf.

Anterior Cruciate Ligament Injuries in Soccer May Occur When the Femur