After an ACL injury it is very important to start exercising as soon as possible. This is helps retain your muscle strength around the ACL, range of motion and control swelling. These functions are vital to prepare an injured athlete for ACL surgery. These exercises can begin immediately after an ACL injury.

After prehabilitation, the knee will feel and look normal. However, IT IS NOT! DO NOT run, cut, jump, land, return to ANY sports that will involve any changing of direction. If one does, the knee will go out and will likely sustain further serious injury.

Retain Muscle Size and Strength

Leg Extensions

(3 sets of 10 reps, every other day)

You can use a leg extension machine at a gym or at home sitting in a chair and using resistance bands. With resistance bands, attach one side of the band behind you (in door jam) and the other to your ankle. While sitting in chair extend your leg straight using the bands as resistance.


If you are experiencing pain in the front part of your knee of in the joint, hold off with this exercise.