Shoulder impingement syndrome occurs as a result of chronic, repeated compression of the rotator cuff tendons. This impingement causes pain and movement problems. An injury to the shoulder can also cause this condition. People who do repeated overhead arm movements are most at risk of developing a shoulder impingement.
Poor posture can also contribute to its development. If left untreated, shoulder impingement can lead to more serious conditions, such as a rotator cuff tear. Physical therapists help decrease pain and improve shoulder motion and strength in people with shoulder impingement syndrome.