[Is the sickle-cell trait a risk factor?].

Generally the sickle-cell trait is not regarded as a risk factor for morbidity or mortality and consequently does not entail occupational restrictions on physical activity (except for military pilots or divers). However many reports have described cases of visceral infarction, disseminated intravascular coagulation, and sudden death. High altitude, strenuous exertion, dehydration and fever may increase the risk. For getting more date, the author propose a medical follow-up program for athletes and soldiers with sickle-cell trait and the implementation of a national registry for sudden deaths involving athletes.