title: FREQUENCY MORPHOLOGY AND MEANING OF THE ELECTROCARDIOGRAPHIC ANOMALIES FOUND IN OLYMPIC MARATHON RUNNERS AND WALKERS.
mesh_terms: D004562:Electrocardiography; D006801:Humans; D012420:Running; D013177:Sports; D013178:Sports Medicine; D014853:Walkers
keywords: ELECTROCARDIOGRAPHY; SPORT MEDICINE; SPORTS