Summary: "How far and how fast can humans go? What defines a person's limits?"...these are some of the questions athlete and sports journalist Alex Hutchinson tries to answer in his book 'Endure: Mind, Body, and the Curiously Elastic Limits of Human Performance' (Harper Collins). Is it all down to the fuel you consume before and during exercise, or is it the oxygen levels in your blood, or the size of your muscles or maybe it's the way you train? Or is it all down to the way you think?
