The powerlifter, U.S. Marine, and academic Fred Hatfield reportedly spent years squatting “only” 550 lbs. He felt he was “wallowing in mediocrity” at that weight, so he scrutinized the movement.

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 ...

THINK ABOUT ALL the activity taking place on your feet—walking, standing, taking the stairs, running, jumping, squatting, lunging. The ankle supports nearly every movement involving the foot. Training ...