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International Journal of Morphology

On-line version ISSN 0717-9502

Abstract

CASTOLDI, Robson Chacon et al. Effects of Concurrent Training on Muscle Fibers of Wistar Rats Submitted to Standard and Hypercaloric Diets. Int. J. Morphol. [online]. 2017, vol.35, n.2, pp.637-643. ISSN 0717-9502.  http://dx.doi.org/10.4067/S0717-95022017000200041.

To analyze the effects of concurrent training (CT) on the muscle fibers of Wistar rats submitted to standard and hypercaloric diets. In total, 40 rats were used, divided into 4 groups: Sedentary Group (GS); Exercise Group (GE), Obese Sedentary Group (OS) and Obese Exercise Group (OE). The animals performed a CT protocol consisting of: muscle strength training and aerobic training, carried out 3 times a week for 45 days. The smallest diameter of muscle fibers (MDF) was analyzed to evaluate muscle hypertrophy. It was observed that the OE group presented a significant decrease in MDF, compared to the OS group (OE=77.41 µm vs. OS=98.58 µm). In addition, the animals that performed CT demonstrated muscle hypertrophy (GE=74.39 µm vs. GS=72.13 µm). In conclusion, the CT with a standard diet promoted an increase in MDF while CT with a hypercaloric diet resulted in a decrease.

Keywords : Training; Muscles; Hypertrophy; Rats; Obesity.

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