"Hearst Magazines and Yahoo may earn commission or revenue on some items through the links below." IF YOU'RE FAMILIAR with the words “abduction” and “adduction” but you're not exactly sure what they ...

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 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 ...

Biceps and triceps moves are often the first that come to mind for upper body strength, but it all starts with the shoulders. The shoulder muscles are responsible for a lot of crucial movements, ...

Shoulder pain can significantly interfere with your exercise activities, but you can still safely perform an upper-body workout with a shoulder injury. The rotator cuff is a group of four muscles — ...

1 Department of Orthopedics, Federal University of São Paulo, São Paulo, Brazil 2 Federal University of São Paulo School of Medicine 3 Federal University of São Paulo 4 Department of Physiology, ...