Presents results of an investigation comparing energy cost and cardiovascular responses of aerobic dance routines performed at different intensity levels in varying amounts of energy expenditure. For low-impact dance to meet minimum guidelines suggested by the American College of Sports Medicine, it should be performed at high intensity. (SM)

Though leanness in athletes is often a natural state, it can pose long-term liability to some athletes' performance and/or health. The physician must determine when leanness is reason for clinical concern. Athletes who do not eat enough to sustain training must either reduce the exercise load or increase nutritional intake. (Author/SM)