MATT FITZGERALD is a certified sports nutritionist and the author of numerous books on running, triathlon, nutrition, and weight loss. His most recent books are Racing Weight Cookbook, Racing Weight Quick Start Guide, RUN: The Mind-Body Method of Running by Feel, Racing Weight, and The Runner's Diary. Matt is a regular contributor to Competitor, Men's Fitness, Men's Health, Outside, Runner's World, Bicycling, Running Times, Women's Running, and other sports and fitness publications. Fitzgerald is a featured coach on Training Peaks, Pear Sports, and Active.com. He is a certified sports nutritionist (CISSN) licensed by the International Society of Sports Nutrition. He lives and trains near San Francisco, California.

How Bad Do You Want It? revisits some of the most extraordinary moments from the history of endurance sports to show how mental strength allows some athletes to perform at a level way beyond their physical limits - to will their body to do what was previously thought biologically impossible.