Performance física e hipertrofia ventricular relacionada ao treinamento aeróbico contínuo e intervalado em ratos

Abstract

Physical performance and ventricular hypertrophy related to continuous and intervalaerobic training in ratsIt is known that the heart of individuals presents a variety of morphological and functional changes resulting from physical training. Among these we can highlight the development of ventricular hypertrophy as a major beneficial adaptations of the cardiovascular system to the exercise. The present study aimed to evaluate the physical performance and changes in weight and body composition and cardiac tissue of rats submitted todifferent models of aerobic training. For the study we used 15 female Wistar rats at 60 days of age, obtained from the Central Animal Laboratory of the State University of Ceará. The animals were divided into groups: Sedentary Control (C), Continuos Training (CT), Interval Training (IT). The body weight of the animals was monitored weeklyand theaerobic capacity was assessed by maximal exercise testing. CT and IT groups underwent training for six weeks. The CT group trained 30 minutes continuously and thegroup IT trained30 minutes with3 series of10 minutes and a break of 10 minutes between series. The animals were sacrificed 72 hours after the last MET, the skeletal,cardiac muscle tissue andbody fatwere dissected and weighted. The data wasexpressedas mean and standard error considering statistical difference at p <0.05 (one-way ANOVA). The experimental groups showed similar values to growthbody, body composition andcardiac mass, functional gain relatedtophysical capacity was similar in the groups CT and ITrelated toC group, with the IT group showing left ventricular hypertrophy compared to the CT group. Thus,it is suggested that the aerobic training interval can be effective in induction of cardiac hypertrophy.