Tendons are strong cord like structures which start from fleshy belly of muscles and are inserted onto bone on which the action of muscle is intended. Integrity of tendon-muscle unit is very important for any movement of the joint on which acts. The lack of function of muscle-tendon unit can be due to variety of reasons like injury to nerve supplying the muscle leading to paralysis of the muscle, injury to tendon leading to its discontinuity, tendon getting stuck in a scar tissue etc.