The rotator cuff is a term given to the group of muscles (Supraspinatus, Infraspinatus, Subscapularis, and Teres Minor) that all function together to provide the glenohumeral joint (shoulder) with dynamic stability and movement. These muscles are active during any and all movements of the shoulder and can become injured and torn leading to restrictions in movement and pain. Thus any dysfunction in these muscles can reduce the stability of the shoulder joint and predispose to injury. A strained or torn rotator cuff can become injured due to an acute trauma, or it can occur as a result of wear and tear to the muscles from repetitive motions. Proper functioning and strength of the rotator cuff is vital in preventing injury and optimizing performance. Strengthening of the rotator cuff should be done for pre-habilitation, and is also an integral part in rehabilitation for any shoulder problem.