1.To determine the loss of antioxidative status in the heart of ovariectomized rat 2.To determine the preventive effects of exogenous antioxidant on changes in cardiac contractile properties of ovariectomized rat 3.To determine the significance of exercise training in preventing changes of antioxidative status in the heart of ovariectomized rat 4.To determine the preventive effects of pomegranate intake on the antioxidative status and the cardiac contractile properties of ovariectomized rat