The amount of protein needed by athletes is an area of controversy. Some researchers are studying the claims that protein supplements stimulate muscle growth. Others are examining the protein needs of endurance and strength athletes. However, few studies have controlled for the right mix of nutrition and exercise variables. (Author/SM)

Headaches experienced by athletes are categorized (exertional, effort, and trauma-triggered migraines), and treatment methods related. Consequences of misdiagnosis, lack of reporting, and poor monitoring are discussed as well as categories of athletes most likely to suffer sports-related headaches. (IAH)

Several physicians discuss the tests they use to diagnose exercise-induced asthma (EIA), the medications they typically prescribe and why, and the importance of properly educating athletes about EIA. (JD)

The effectiveness of knee braces in preventing knee injuries in football is inconclusive. This article reviews research from epidemiologic, cadaver, and surrogate studies; discusses reasons for conflicting study results, including research design problems; and describes alternative approaches that have been suggested. (IAH)