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 ...

The back isn't just the largest muscle group in the upper body; it's also a real calorie-burning machine. The stronger and more active your back is, the more calories you'll burn throughout the day!

It's easy to assume pull-ups are all about the arms—but the real engines behind a strong, controlled rep are the back and shoulders. In fact, if you’ve ever tried (and struggled) to get your chin over ...