SARAH LORGE BUTLER is a Runner's World contributing editor who has covered the racing, training, and nutrition habits of runners of all abilities, from beginners to Olympians.

LESLIE BONCI, MPH, RD, is one of the country's most recognized sports dietitians and a consultant for the Pittsburgh Steelers, Pittsburgh Penguins, Pittsburgh Pirates, and other professional and amateur teams.

BUDD COATES, MS, has a degree in exercise physiology and is a member of the Runner's World advisory board.

RUNNER'S WORLD is the worldwide authority on running information. With a goal to inform, advise, and motivate runners of all ages and abilities, Runner's World aims to help runners achieve their personal health, fitness, and performance goals, and to inspire them with vivid, memorable storytelling.