Initial Recovery

• Wear a knee brace when first doing exercises to rehabilitate an MCL injury. Do isometric quadriceps exercises sitting down with your legs extended. Push your leg down against the floor, hold it for five seconds, and repeat. Do the exercise for both legs. Another good exercise is straight leg raises. While lying flat on the floor, extend your leg and lift it from the hip, holding it in the air for five seconds, then lowering it. Do this exercise 10 times with each leg, and do it twice a day.
  
  

Stationary Biking

• As your MCL begins to recover, stationary biking can be done to exercise your knee and get good range of motion. Raise the seat of the bike so that you can fully straighten the leg out on the down-pedal. Start by doing 15 minutes a day and gradually increase the length of time on the bike, aiming for 30 minutes.
  
  

Final Exercises

• As the MCL improves, you should start running as well as do such lateral agility exercises as horizontal jumps. Running should be done in a normal straight line, as well as in circular patterns and a figure eight pattern. In addition to running, stair climbing can help strengthen the muscles in the knee and improve the chances of avoiding reinjury.