Damage to the anterior cruciate ligament (ACL) is a common yet severe knee injury. Most people who experience a torn ACL recover in 3–12 months, depending on injury severity and goals for rehabilitation.
The lateral collateral ligament (LCL) is a thin band of connective tissue that runs along the outside of the knee. It connects the femur to the fibula and stabilizes the knee, bracing it from unusual impact. However, injuries are common, particularly during contact sports.