"Power, Speed, Endurance" (PSE) is a revolutionary high-intensity interval training system that has catapulted thousands of endurance athletes to the next level. Based on hard science and developed by world-class coaches and professional marathoners, tri-athletes, and Ironman competitors, PSE unveil[...]
In "Unbreakable Runner," CrossFit Endurance founder Brian 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. "Unbreakable Runner" challenges conventional training tenet[...]