Gretchen Reynolds

Have you thought about switching to barefoot running? New York Times exercise columnist Gretchen Reynolds did -- and promptly injured herself. She details what she did wrong -- and how to keep your own feet healthy -- in her new book, The First 20 Minutes.

New York Times "Phys Ed" columnists Gretchen Reynolds has some simple advice for staying healthy: Stand up. Move around. In her new book, The First 20 Minutes, she explains the hazards of a sedentary lifestyle, and details some surprisingly simple ways to stay fit.