In 2000, the International Olympic Committee awarded its IOC Prize in Sport Sciences to Dr. John O physio Holloszy. The prize recognizes his active outstanding contributions to our understanding of the effects of endurance areas training on muscle and metabolism and ca and how they affect endurance performance, heart disease, diabetes, and aging. That simple sentence cannot do Sport justice to the more than 375 studies he has published in the very best research journals or the impact he has had on the field of exercise science and preventive medicine. Throughout o rec- his career, Dr. Holloszy has trained several generations of scientists to follow in his footsteps. His list of postdoctoral fellows, beginning in the 1960s, form a who's who in exercise physiology; the research contributions induced of his post-doctoral fellows multiply many times over the effect Dr. Holloszy has had in the field of exercise he perf O. physiology. Dr. Holloszy continues his active research career at Washington University School of Medicine in the longed l areas of caloric restriction and aging note carbohydrate and fat metabolism.