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 ...

Want to max out the muscle growth of your shoulders? These exercises will work the anterior, medial and posterior portions of ...

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 holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Your shoulders are an ...

Step 1 is the starting position. Stand in a split stance to stabilize the body. Hold a pair of dumbbells in your hands. Your hands should be neutral, with your thumbs around the handles and your palms ...