QUICK, STAND UP and reach your arm overhead. Does your back arch as you do this? Does your chest puff out like a cartoon character? If you answered both questions with a resounding “yes,” then there’s ...

Picture the perfect running gait: You lean forward from the ankles, arms swinging back and forth to support your momentum, as your legs move in a full circle and your feet land gracefully, one at a ...

Every lifter knows how important the lower body is for a strong squat, but the upper body often gets overlooked. Shoulder mobility plays a big role in how securely you can hold the bar and how much ...

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 ...

Welcome to Shaving Strokes, a GOLF.com series where the game’s brightest minds share their tips to help you, well, shave strokes! Today, GOLF Top 100 Teacher Tom Stickney explains how learning about ...

Four muscles and their tendons make up the rotator cuff; they smooth arm motion and stabilize the shoulder joint. The supraspinatus, infraspinatus, teres minor, and subscapularis aid the shoulder when ...