Hypnosis in Sport and Exercise Psychologyt is remarkable that hypnosis has not been used more frequently by I workers in the field of sport and exercise psychology because the difference between success and failure is often minuscule. Indeed, the difference between a gold medal in Olympic competition and failure to even qualify for the final event is sometimes less than a hundredth of a second. Hence, any ergogenic procedure that might enhance performance by even a small margin (e.g., O.OOl%), providing it is legal, would have potential value.At this point in time, the use of hypnosis has not been banned by the United States Olympic Committee (USOC) or the International Olympic Committee (IOC), nor are there any regulations against the use of hypnosis by other sport governing bodies, such as the National Collegiate Athletic Association (NCAA) or professional organizations, such as the American Psychological Association (AF'A) or the American College of Sports Medicine (ACSM). There are, however, many instances in which the use of hypnosis in the practice of sport psychology or sports medicine would be questionable from both an ethical and a moral standpoint, and although not in direct violation of existing rules and codes, such actions would potentially violate the "spirit of the law." It is inappropriate, for example, to use drugs such as morphine or no-Adapted from The Handbook of Clinical Hypnosis (pp. 649-670).