Although rare, sports related sudden cardiac deaths in children and ad
olescents justify the search for risk factors in any child or adolesce
nt who wishes to practice sports. Each time that history and careful c
linical cardiovascular examination point to a possible cardiovascular
abnormality, an electrocardiogram and an echocardiography must be perf
ormed. Exercise testing is useful to appreciate the cardiovascular tol
erance, either in normal subjects or in subjects with a cardiovascular
abnormality; its interpretation requires good knowledge and understan
ding of hemodynamic responses to exercise. Indications, risks and proc
edures of exercise resting are discussed wish reference to exercise ph
ysiology.