What is the ACL? The ACL stands for the anterior cruciate ligament, which is one of the stabilizing ligaments in the knee joint. It is located behind the kneecap and connects the femur to the shin bone (tibia). Importantly, this ligament prevents excess forward and backwards movements of the femur and tibia overtop each other. When people say their ACL is injured, this refers to either a sprain or tear of the ACL ligament. How is the ACL injured? Ligaments work as a connective, stabilizing band for two bones. The ACL, one of two ligaments that cross in the middle of the knee, connects your thighbone to your shinbone and helps stabilize your knee joint. ACL injuries often happen during sports and fitness activities that put high shear and stress forces on the knee: Suddenly slowing down and changing direction (cutting) Pivoting with your foot firmly planted (plant and…
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