Barry Murray is a sports nutritionist and coach for elite endurance athletes. His main focus is on adapting athletes to burn fat instead of carbs, and his work with Tour de France cyclists along with his own performances (several wins in ultra marathons) lend credence to his ideas. In this podcast we discuss how long it takes to fat adapt, how fat adaptation is not the only part of athletic performance, and why you shouldn't go out and run 50k on no breakfast starting tomorrow morning.