This is a chronic pain disorder that puts pressure on trigger points in your muscles and joints after they have become fatigued, or overly tired, which increases the likelihood of injury. Overloaded muscles and soft tissues without proper rest have no chance to recover fully. This problem often hampers athletes who have to throw, jump, or run repeatedly. It can also affect people who work in jobs where they keep doing the same action again and again, such as typing, gripping, and lifting.

All body tissues are in a constant state of change. Minor damage occurs continuously, which the body must repair in the normal course of a day. But the damage can occur faster than the repair mechanisms can keep up with it. When this happens, the tissues become weaker. They may begin to hurt. The weaker the tissues become, the more likely they will suffer even more damage