Effects of exercise and its cessation on the heart and its blood supply.
D000818:Animals; D001835:Body Weight; D002196:Capillaries / Q000032:analysis; D006332:Cardiomegaly / Q000209:etiology*; D003097:Collateral Circulation; D003331:Coronary Vessels / Q000033:anatomy & histology*; D006321:Heart / Q000033:anatomy & histology*; D008297:Male; D008722:Methods; D009929:Organ Size; D005082:Physical Exertion / Q000502:physiology*; D051381:Rats; D013997:Time Factors