This book is about running, training and much more. Mark Cucuzzella is a family medicine doctor in West Virginia . He has vast experience in running marathons. He is also really into low carb diet because he became prediabetic despite being thin and very fit. The way we run makes a big difference in our energy consumption and risk for injuries. Just watch this video of him running: youtube link. More information about training is on the resources page associated with the book.