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 ...

Proprioceptive neuromuscular facilitation (PNF) is a form of assisted stretching. It combines passive stretching with muscle contraction. First, your partner applies force to stretch your muscle ...

Building shoulders that impressively stretch out a T-shirt is no simple feat. Several muscles make up the upper torso, dominated by the front, middle, and rear delts. Because they’re responsible for ...

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 ...

Beth Skwarecki is Lifehacker’s Senior Health Editor and has been writing about health, fitness, and science here since 2015. Beth was the recipient of the 2017 Carnegie Science Award in science ...

Frozen shoulder, also known as adhesive capsulitis, is a condition wherein your shoulder movement gets limited. This happens when the connective tissue around the shoulder becomes stiff, thick and ...

SANTA CLARA, California, May 13. ANY exercise results in musculoskeletal stress, damaging structures in the body. Every joint has static (i.e. ligaments) and dynamic (i.e. muscles) structures.