There is something magical about the way some people can push their physical limits. Think about Roger Bannister breaking the four-minute mile in 1954, or Diana Nyad’s 103 mile swim from Cuba to Florida, or the countless people who have climbed Mt. Everest. Their physical limits impress us but we also know it’s not all about the body. So much is influenced by the mind, their motivation, and their shear ability to put themselves on the line. Today we talk about the role the brain plays when it comes to pushing the limits of endurance. Alex Hutchinson is an award-winning journalist and the author of Endure: Mind, Body, and the Curiously Elastic Limits of Human Performance.