The revised edition of the bestselling ChiRunning, a groundbreaking program from ultra-marathoner and nationally-known coach Danny Dreyer, that teaches you how

'Heads up – here's how to run like a pro' - The Times 'A fascinating book' - Adharanand Finn, author of Running With the Kenyans 'I'm convinced that Shane's i

How much power does your human engine have? How much power do you need for running in different conditions? How can you optimize your training and racing perfor