How can sprinter Usain Bolt break his world record without running any faster? Why do high-jumpers use the Fosbury Flop? What's the best strategy for taking penalties in football? What statistical advantage do left-handed boxers have over their right-handed opponents? And did you know that gymnasts can experience stronger g-forces than roller-coaster designers are allowed to create? John D. Barrow shows how maths can give us surprising and enlivening insights into the world of sports - essential reading for competitors, armchair enthusiasts and maths-lovers alike.