The knee is a hinge joint situated between the femur and tibia and fibula. The quadriceps straighten the leg into extension. Here are methods of recovery for MCL.
Fighters will benefit from increasing a lean body mass while minimizing a percentage of body fat to maintain a weight class. (Amtmann JA, Amtmann KA, and Spath WK. Locate and rate of perceived exertion responses of athletes training for and competing in a mixed martial arts event. J Strength Cond Res 22:645-647, 2008)