Stamina, strength, endurance, resilience: these are the keys to successful running. Yet injury rates from running are at an all-time high, and training is often to blame. CrossFit Endurance founder, Brain MacKenzie and journalist T.J. Murphy examine long-held beliefs about how to train, tearing down those traditions to reveal new principles for a lifetime of healthy, powerful running. Challenging conventional training, the authors show how reduced mileage and high intensity training will make you a stronger, more durable athlete and prepare you for races of any distance.