Scientific methods and modern equipment applied to the study of physical performance often produce unexpected findings; today's athletes, regardless of age or sex, are learning not only how to be stronger and more enduring than ever but also how to minimize wear and tear on their bodies. Kettlekamp surveys both medical advances and current training strategies, including aerobic, isometric, isotonic and isokinetic exercising, diet, and mental preparation (imaging, biofeedback, meditation). This is not intended to be a training manual; the author spends much more time describing various machines used for measuring and improving athletic ability than he does giving practical advice. Readers will find a good introduction to the results and dangers attached to the use of drugs, steroids and blood doping, and some well-balanced cautions on intensive training by prepubescent athletes. This does not replace Berger's Sports Medicine (Crowell, 1982), but makes an acceptable added purchase. Seen in galleys: partial glossary, no index or illustrations.