Most noncontact injuries occur around joints. Joints can become misaligned due to overactivity or underactivity of muscles that surround them. If a muscle on one side of a joint is short and overactive, the muscle on the opposite side of the joint will be long and underactive, which will create an imbalance and limit the movement of the joint. This imbalance can lead to compensation and eventually a breakdown of the movement chain.
When this happens, injury can occur.