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PURPOSE: Exercise improve myocardial cell protection and vascular function through cell repair and suppression of oxidative stress in cardiovascular diseases caused by aging. This study aimed to investigate the effect of combine exercise on HSP70 and SOD1 protein expression of aorta, skeletal muscle and myocardium in high fat diet induced obese aging rats. METHODS: Male 50-week-old Sprague Dawley rats (n=40) were divided into normal diet (ND, n=10), normal diet+exercise (NDEx, n=10), high fat diet (HFD, n=10), and high fat diet+exercise (HFDEx, n=10) groups. After six weeks on a high fat diet to induce obesity, a 12-week combine exercise program was implemented, which combine exercise (treadmill running+ladder climbing) three times a week for 45 minutes per session. RESULTS: Body weight was significantly decreased after 12 weeks combine exercise program compared to the ND group (p<.05) and HFDEx group compared to the HFD group (p<.05), respectively. After completing the 12-week exercise program, heat shock protein 70 (HSP70) and superoxide dismutase 1 (SOD1) expressions were significantly (p<.05) higher in the NDEx group compared to the ND group in the myocardium. Also, SOD1 protein expression was significantly (p<.05) higher in the NDEx group compared to the ND group and HFDEx group compared to the HFD group in the skeletal muscle. CONCLUSIONS: : In conclusion, combine exercise intervention of high fat diet-induced obesity resulted in decreased cell repair protein and antioxidant enzyme protein in the myocardium. Therefore, it is thought that combine exercise intervention for obese induced rats improved the cell repair protein and antioxidant enzyme activity of the myocardium.

Effects of Combine Exercise on HSP70 and SOD1 Expression of Aorta, Skeletal Muscle and Myocardium in High Fat Diet induced Obese Aging Rats