Effects of 14 Weeks Resistance Training on Muscle Tissue in Wistar Rats

The objective of the present study was to analyze the effects of 14 weeks of resistance training on muscle tissue in Wistar rats. 20 male Wistar rats were used in the study; 10 allocated to the untrained group (Group 1) and 10 to the trained (Group 2). The physical training (PT) program consisted of...

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Autores principales:	Castoldi,Robson Chacon, Teixeira,Giovana Rampazzo, Malheiro,Olga Cristina de Mello, Camargo,Regina Celi Trindade, Belangero,William Dias, Camargo Filho,José Carlos Silva
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2015
Materias:	Swimming Striated muscle Physical Exercise
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000200007
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spelling	oai:scielo:S0717-950220150002000072015-08-13Effects of 14 Weeks Resistance Training on Muscle Tissue in Wistar RatsCastoldi,Robson ChaconTeixeira,Giovana RampazzoMalheiro,Olga Cristina de MelloCamargo,Regina Celi TrindadeBelangero,William DiasCamargo Filho,José Carlos Silva Swimming Striated muscle Physical Exercise The objective of the present study was to analyze the effects of 14 weeks of resistance training on muscle tissue in Wistar rats. 20 male Wistar rats were used in the study; 10 allocated to the untrained group (Group 1) and 10 to the trained (Group 2). The physical training (PT) program consisted of four sets of ten water jumps, three times a week for 14 weeks. A progressive increase in load was applied from the14nd to the 42nd day. Following this, the animals were euthanized with an overdose of potassium chlorate (100 mg/kg) applied intraperitoneally. The ventral portion of the gastrocnemius muscle was removed for histological processing. The muscles were frozen in liquid nitrogen and cut into thicknesses of 5 µm using a rotative microtome. The sections were stained with hematoxylin-eosin for general analysis of the structure of muscles and analysis of the area of muscle fibers. The reaction with NADH-TR was utilized for differentiation between fast twitch (FT) and slow twitch (ST) fibers. The sections subjected to staining and histochemical reactions were observed in normal and polarized light and photomicrographed using a microscope (Zeiss®). The measurement of muscle fibers was performed using AxioVision software (Zeiss®). Statistical analysis was performed using the Student t test for analysis of the samples average. An average area of 5061.29 µm2 for Group 1 versus 5768.93 µm2 for Group 2 was observed. It can be concluded that 14 weeks of training with water jumps was effective in increasing muscle area. An increase in transverse area section (TAS) of ST and FT was also verified in the trained group.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.33 n.2 20152015-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000200007en10.4067/S0717-95022015000200007
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Swimming Striated muscle Physical Exercise
spellingShingle	Swimming Striated muscle Physical Exercise Castoldi,Robson Chacon Teixeira,Giovana Rampazzo Malheiro,Olga Cristina de Mello Camargo,Regina Celi Trindade Belangero,William Dias Camargo Filho,José Carlos Silva Effects of 14 Weeks Resistance Training on Muscle Tissue in Wistar Rats
description	The objective of the present study was to analyze the effects of 14 weeks of resistance training on muscle tissue in Wistar rats. 20 male Wistar rats were used in the study; 10 allocated to the untrained group (Group 1) and 10 to the trained (Group 2). The physical training (PT) program consisted of four sets of ten water jumps, three times a week for 14 weeks. A progressive increase in load was applied from the14nd to the 42nd day. Following this, the animals were euthanized with an overdose of potassium chlorate (100 mg/kg) applied intraperitoneally. The ventral portion of the gastrocnemius muscle was removed for histological processing. The muscles were frozen in liquid nitrogen and cut into thicknesses of 5 µm using a rotative microtome. The sections were stained with hematoxylin-eosin for general analysis of the structure of muscles and analysis of the area of muscle fibers. The reaction with NADH-TR was utilized for differentiation between fast twitch (FT) and slow twitch (ST) fibers. The sections subjected to staining and histochemical reactions were observed in normal and polarized light and photomicrographed using a microscope (Zeiss®). The measurement of muscle fibers was performed using AxioVision software (Zeiss®). Statistical analysis was performed using the Student t test for analysis of the samples average. An average area of 5061.29 µm2 for Group 1 versus 5768.93 µm2 for Group 2 was observed. It can be concluded that 14 weeks of training with water jumps was effective in increasing muscle area. An increase in transverse area section (TAS) of ST and FT was also verified in the trained group.
author	Castoldi,Robson Chacon Teixeira,Giovana Rampazzo Malheiro,Olga Cristina de Mello Camargo,Regina Celi Trindade Belangero,William Dias Camargo Filho,José Carlos Silva
author_facet	Castoldi,Robson Chacon Teixeira,Giovana Rampazzo Malheiro,Olga Cristina de Mello Camargo,Regina Celi Trindade Belangero,William Dias Camargo Filho,José Carlos Silva
author_sort	Castoldi,Robson Chacon
title	Effects of 14 Weeks Resistance Training on Muscle Tissue in Wistar Rats
title_short	Effects of 14 Weeks Resistance Training on Muscle Tissue in Wistar Rats
title_full	Effects of 14 Weeks Resistance Training on Muscle Tissue in Wistar Rats
title_fullStr	Effects of 14 Weeks Resistance Training on Muscle Tissue in Wistar Rats
title_full_unstemmed	Effects of 14 Weeks Resistance Training on Muscle Tissue in Wistar Rats
title_sort	effects of 14 weeks resistance training on muscle tissue in wistar rats
publisher	Sociedad Chilena de Anatomía
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000200007
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Effects of 14 Weeks Resistance Training on Muscle Tissue in Wistar Rats

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