Four muscles and their tendons make up the rotator cuff; they smooth arm motion and stabilize the shoulder joint. The supraspinatus, infraspinatus, teres minor, and subscapularis aid the shoulder when ...

A pulled muscle is an injury to your muscle fibers. Muscle fibers are the large cells that make up your muscles. Your muscles allow you to move when they contract and relax. Many people use the terms ...

Injure a tendon and you might not notice right away, but beware: These injuries often fail to heal properly, putting everyday activities at risk. "No matter how strong your muscle is, you're not going ...