This is the bestselling sports nutrition guide. With over 550,000 copies sold, Nancy Clark's Sports Nutrition Guidebook is the number one nutrition resource for active people. Nancy Clark is an internationally respected sports nutritionist and registered dietitian who specializes in nutrition for exercise and health and the nutritional management of eating disorders. The latest edition provides comprehensive coverage for athletes and fitness exercisers alike. It contains updated information on the nutrition needs of both sexes in several sports and also includes new information on supplements, energy drinks, and nutrient timing as well as advice for athletes who have undergone gastric bypass surgery.