Jason R. Karp, PhD, is one of America’s foremost running experts, an established writer and author, an exercise physiologist, and the creator of the Revo2lution Running™ certification. Dr. Karp has given dozens of international lectures and has been a featured speaker at most of the world’s top fitness conferences and coaching clinics. His previous books include Running a Marathon for Dummies, Running for Women, 101 Winning Racing Strategies for Runners, 101 Developmental Concepts & Workouts for Cross Country Runners, and The Inner Runner.