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Matt Fitzgerald is the author of numerous books on running, triathlon, nutrition, and weight loss. A prolific health and fitness journalist, Fitzgerald writes regularly for such national publications as Bicycling, Experience Life, Her Sports, Maxim, Men's Fitness, Men's Health, Outside, and Runner's World. He is currently a senior editor with Triathlete, is a featured running expert on Active.com, and contributes to the Active Runner e-mail newsletter. Fitzgerald has written extensively on performance-enhancing drugs and how to excel without them for publications including Muscle Media and Running Times.

Fitzgerald serves as a communications consultant to a number of sports nutrition companies. He is the editor of PoweringMuscles.com, an online nutrition information resource for athletes and exercisers. In 2006 he became a certified sports nutritionist licensed by the International Society of Sports Nutrition. Outside of writing, Fitzgerald is a featured coach with TrainingPeaks, the leader in providing online training services to endurance athletes and coaches. In this capacity, he creates interactive training plans for runners and triathletes.

Matt Fitzgerald is the coauthor of The Runner's Edge.