An anterior cruciate ligament injury is the over-stretching or tearing of the anterior cruciate ligament (ACL) in the knee. A tear may be partial or complete.

Treatment of ACL tears may be operative or non-operative. In most instances during the immediate aftermath of the injury, the patient is advised to stay off the leg and elevate it, apply ice, and take medication, such as ibuprofen to reduce pain and inflammation. A course of physical therapy is prescribed to strengthen surrounding muscles, and a brace may be fitted for use during activities that would place special stress on the knee.

• Proper leg muscle strength training and core strengthening
• Proper neuromuscular (balance and speed) training
• Proper coaching on jumping and landing to avoid straight-leg landing
• Proper footwear and orthotics if necessary