Book excerpt: A guide for exercise scientists, coaches, and athletes who want to learn new ways to treat and prevent athletic overtraining and underperformance, this book draws on the fields of medicine, physiology, periodization training, and psychology as well as studies of motivation, health, and lifestyles to explore all aspects of underrecovery in sports and in everyday life. Emphasis is on recovery and intervention strategies from a psychological and physiological perspective. Kellmann is on the faculty of sport science at the University of Bochum in Germany. Annotation copyrighted by Book News, Inc., Portland, OR