Just like your last relationship, the shoulder is super complex. The shoulder capsule, a tough fibrous sleeve, helps to hold the ball-and-socket joint together. An inner layer, called the synovium, ...

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 ...

Ask someone in the gym to point to their trapezius muscles, and they’ll probably gesture toward the small mounds nestled between their neck and shoulders—but that’s really just the tip of the iceberg.