Fourth edition of a landmark text, now completely updated and expanded, but with the same winning mix of advice on training, sport psychology, health and physiology, together with profiles of world class runners Offers details on physiology, training, racing, injuries, world-class athletes, and races. This book answers questions for those who are serious about the sport for example, how your body systems respond to training, the effects of different training methods, how to detect and avoid overtraining, and genetic versus trainable potential.