The Effects of High Intensity Interval Training Preconditioning on Metabolites of NO (NO2- ,NO3-) and Infarction Size of Myocardium after Ischemia/Reperfusion Injury in Healthy Male Rat (Study to Survey one of Cardioprotective Mechanisms of Exercise)

Document Type : Research Paper


1 Assistant Professor of Sport Physiology, Department of Sport Sciences, Faculty of Education and Psychology, Shiraz University, Shiraz, Iran

2 Professor of Sport Physiology at Tehran University, Tehran, Iran

3 Associate Professor of Sport Physiology, University of Tehran, Tehran, Iran

4 . Professor of Sport Physiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.


The purpose of this study was the effects of exercise preconditioning with high intensity interval training (HIIT) on metabolites of NO (NO2- , NO3-), and infarction size of myocardium after ischemia/reperfusion injury in healthy male rat. For this reason, 44 wistar rat were randomly divided into 4 group HIIT (n=8), Group HIIT + protocol IR (n=14), control group (n=8) and control + protocol IR (n=14). Each session of HIIT was 1 hour of exercise in the 3-stage, 6-minute running of 50 to 60% VO2max warm up, 7 Period 7 minute running with a including of 5 to 20 ° slop (4 min with an intensity of 80 to 120, 3 minutes of 50 - 60% VO2max) and 5-minute running of 50 to 60% VO2max cool-down. Control group did not participate in any exercise program. NO and its metabolites were measured by using Griess reaction. Results showed there was a significant difference on nitrite (0.855 mol per liter, equivalent to 34.79%), nitrate (6.202 mol per liter, equivalent to 149.48%) and NOX (6.6 micromoles per liter, equivalent to 98.11%) levels in HIIT group than control group. That, the results showed, AAR was significantly more (9.06%, p=0.010) and INF was significantly lesser (23.2%, p <0.001) in exercise training group in comparison with control. In generally, it seems that increase in No- NO3-, NO2- axis is one of mechanisms that HIIT exercise program can protect heart from Ischemia/Reperfusion injury and decreased myocardial infarction.


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