Noninvasive assessment of seasonal variations in cardiac structure and function in cyclists.
D000293:Adolescent; D000328:Adult; D001642:Bicycling; D004562:Electrocardiography; D006321:Heart / Q000033:anatomy & histology / Q000502:physiology*; D006334:Heart Function Tests; D006801:Humans; D008297:Male; D012621:Seasons; D013177:Sports; D013178:Sports Medicine; D013318:Stroke Volume; D013599:Systole