Interval and continuous exercise enhances aerobic capacity and hemodynamic function in CHF rats
نویسندگان
چکیده
OBJECTIVE The aim of the present study was to compare the effects of continuous versus interval aerobic exercise training on hemodynamic parameters, cardiac remodeling, and maximal exercise capacity (MEC) in chronic heart failure (CHF) rats. METHOD Twenty-four male Wistar rats were subjected to myocardial infarction (MI) surgery. Five weeks post MI, the animals were assigned to one of three groups: sedentary group (CHF-Sed, n=8), aerobic continuous training group (CHF-ACT, n=8), and aerobic interval training group (CHF-AIT, n=8). Treadmill training was performed five times a week for 8 weeks (ACT: 50 min/day at 15 m/min and AIT: 40 min/day with 8 min of warm-up at 10 m/min and exercise at 15 m/min 4×4 min interspersed with 4×4 min at 23 m/min). MEC was evaluated pre and post exercise program. RESULTS Left ventricular end-diastolic pressure (LVEDP), left ventricular mass/body mass ratio (LVM:BM), and total collagen volume fraction were lower in the trained groups compared with the sedentary group, but no difference was found between the trained groups. Systolic ventricular pressure (SVP) and maximum positive derivative of LV pressure (+dP/dtmax) were higher in the trained groups, but CHF-ACT showed higher +dP/dt(max) compared to CHF-AIT. Both training regimens were able to increase MEC. However, the aerobic interval training was superior for improving MEC. CONCLUSION Aerobic training is an important intervention to improve cardiac function and remodeling and physical capacity in CHF rats. Interval training is a potential strategy to maximize the results, but exercise type and intensity are still topics to be explored.
منابع مشابه
Exercise training has restorative potential on myocardial energy metabolism in rats with chronic heart failure
Objective(s): Exercise training is a well-known accelerator for the treatment of chronic heart failure (CHF). The current study aimed to investigate the restorative effects of aerobic interval training (AIT) intervention on myocardial energy metabolism in CHF rats. Materials and Methods: Post-myocardial infarction (MI) heart failure animal model was established. The Sprague-Dawley rats were ran...
متن کاملCHANGES OF PERK AND CHOP PROTEINS IN ENDOPLASMIC RETICULUM OF CARDIAC MYOCYTES AND TNF IN DIABETIC WISTAR RATS FOLLOWING CONTINUOUS AND INTERVAL EXERCISE
Background: Physical activity plays a major role in the prevention of cardiovascular disease and diabetes, but the effect of intense activity on endoplasmic reticulum proteins and apoptosis and necroptosis in diabetic conditions is unclear. The aim of the present study was to investigate the changes of PERK and CHOP proteins in endoplasmic reticulum of cardiac myocytes of diabetic Wistar rats f...
متن کاملتأثیر هشت هفته تمرین تناوبی خیلی شدید بر بیان ژن خانواده miR-29 و هایپرتروفی عضلهی قلبی رتهای نر سالم
Background and Objective: In this study the effect of high intensity interval training on miR-29 expression that is expressed in the heart and in the regulation of physiological processes, including extracellular matrix and cardiac hypertrophy of healthy male rats were examined. Materials and Methods: 16 Wistar rats were divided into training (n=8) and control (n=8) groups. After one week of fa...
متن کاملاثر مکمل ویتامین E بر پاسخهای پراکسیداسیون لیپیدی و دفاع آنتیاکسیدانتی متعاقب یک فعالیت هوازی درماندهساز
Background: physical exercise could induce lipid peroxidation as a result of oxidative stress. And intake of antioxidant compound may alleviate this stress by enhancing antioxidant defense. This study aimed to investigate the effect of vitamin E supplementation as an antioxidant on the lipid peroxidation and serum total antioxidant capacity following exhaustive continuous aerobic exercise in ...
متن کاملAerobic Interval Exercise Training Induces Greater Reduction in Cardiac Workload in the Recovery Period in Rats
BACKGROUND Aerobic interval exercise training has greater benefits on cardiovascular function as compared with aerobic continuous exercise training. OBJECTIVE The present study aimed at analyzing the effects of both exercise modalities on acute and subacute hemodynamic responses of healthy rats. METHODS Thirty male rats were randomly assigned into three groups as follows: continuous exercis...
متن کامل