Sometimes, too much exercise can induce muscle soreness, a phenomenon well known to everyone who has demanded muscular performance beyond his or her capacity. When a muscle is overused, first deteriorating processes set in, which are followed by reparative processes. If sufficient time for repair is allowed, the muscle tissue may end up with increased capacities. Prolonged overuse with insufficient time for repair, on the other hand, causes fatigue and impairs muscle performance. Such prolonged overuse may induce chronic degenerative changes in the muscles.