The anterior cruciate ligament (ACL) is one of the four main stabilising ligaments of the knee.
The role of the ACL is to prevent forward movement of the lower leg bone (i.e. tibia) from the femur. This ligament is important in knee stability during contact sports as well as sports that involve rapid changes in direction and pivoting movements.
During the injury, you may hear a pop or crack sound and there may be swelling of the knee following injury. You may also have difficulty fully bending or straightening the knee .
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