Just forty years ago, Jim Hines ran the 100 metres in under 100 seconds. Now Usain Bolt is inching close to the 9.50 second mark, begging the question: exactly how fast can a human go? In this sample from The Perfection Point, John Brenkus utilizes cutting edge science and incredible physical feats in the most elite sports to uncover what it takes to reach the 'perfection point' of the 100m race - that measurement of speed that supreme athletes can inch ever closer to but never exceed. Shining a light on the crucial balance between physical stamina and emotional drive, this is the guide to the furthest limits of human performance. 'Lively and engaging...this stuff is catnip to sports fans' Wall Street Journal