WHAT IS ROTATOR CUFF TENDINITIS? Your rotator cuff is a group of 4 muscles that act to stabilize the shoulder joint. The 4 rotator cuff muscles are: Supraspinatus Infraspinatus Teres Minor Subscapularis With rotator cuff tendinitis, one (or multiple) of the rotator cuff tendons gets inflamed. Repetitive strain, overhead movements, and increased stress on the…

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