The shoulder muscles are responsible for maintaining the widest range of motion of any joint in your body. This flexibility is also what makes the shoulder prone to instability and injury. Muscles, ...

Your rotator cuff includes several muscles that support range of motion in your arm and shoulder while holding the socket in place. The rotator cuff is a group of four muscles that hold your upper arm ...

Your deltoid muscles make up a main muscle group in your upper body. They’re connected with many other muscles and bones in your upper back, neck, and shoulder region and are extremely mobile. They ...