"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 arm extends from the shoulder to the wrist, including the upper arm and forearm. Different muscles may work together in intricate ways to help the arm, wrists, fingers, and hands function. Knowing ...

Fun fact: The shoulder joint is the most flexible joint in the body because of its ball-and-socket structure, which allows for a wide range of movements. Shoulder mobility exercises and stretches can ...

Bigger muscles have long been associated with strength, confidence and vitality. Visually, they create a powerful silhouette that signals athleticism and capability, which is one reason muscle ...