Every Wednesday, Gretchen Reynolds singlehandedly influences how millions of Americans work out. In her Phys Ed column for The New York Times, she debunks myths, spurs conversation, and creates arguments among her readers by questioning widely held beliefs about exercise. Expanding upon her popular columns, Reynolds tackles the questions we all have and (sometimes) ask about exercise. Consulting experts in physiology, biology, psychology, neurology,...

Based on the premise that dysfunctional movement patterns impede athletic performance, the author presents the construction and function of his own movement and mobility system, based on his midline stabilization and organization, one-joint rule and laws of torque movement principles, all to remedy body stiffness, prevent injuries and improve and extend athletic capabilities.