Influences of physical training on the heart of dogs.
D000818:Animals; D002933:Cineradiography; D003214:Conditioning, Classical; D004285:Dogs; D004562:Electrocardiography; D006321:Heart / Q000033:anatomy & histology / Q000502:physiology*; D006339:Heart Rate; D006352:Heart Ventricles; D008433:Mathematics; D005082:Physical Exertion; D013178:Sports Medicine; D013686:Telemetry; D013997:Time Factors