The rotator cuff is comprised of the tendons of four muscles: the supraspinatus, infraspinatus, teres major and and subscapularis. These muscles all surround and attach to the shoulder, allowing for increased mobility and flexibility of the joint. At the same time, these muscles help to stabilize the shoulder by keeping the humeral

Tendons are the thick, fibrous chords that attach our muscles to the bone. Tendonitis is the irritation and inflammation of these tendons, which can lead to increased pain and weakness with movement. The recovery process of tendonitis can often be slower than in other injuries because tendons, by comparison to muscles, do