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 Range of Motion

Leg Extensions

Quad Sets

(5-15 minutes, 1-2 times per day)

Sit down on the floor or table. Pull your toes back towards the knee (stretching the calf.) Push the back of the knee down so it touches the floor. Tighten the quad (thigh muscle) and made it as hard as possible.


We also want to keep muscle definition and strength prior to your surgery, contracting the muscles will help with range of motion and help get your knee straight.