This dynamic plank variation is redefining how Americans build core strength, balance, and upper-body endurance—without ...

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 ...

A strong set of shoulders is important for an active daily life. Not only does the shoulder joint have the largest range of motion in the body, but the muscles of the shoulder girdle are also ...

Have you ever stumbled on uneven ground (or even ground) but somehow caught yourself before you fell? That’s proprioception, your body’s built-in GPS. It’s your body’s ability to sense where it is in ...

While ripped arms look good, strong shoulders will help you move through life easier. The muscles in your shoulders are involved in every upper body movement, whether you realize it or not. Every ...

Strengthening and mobility exercises can often help reduce shoulder pain and improve joint flexibility. Shoulder pain is a common symptom that affects an estimated 18–26% of adults. In one 2017 ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Your shoulders are an ...