Fiber Type Composition in Semitendinous Muscle of Wistar Rats and Effects of Intermittent Training on its Hypertrophy

Skeletal muscles respond to several stimuli changing their phenotype. Muscular fibers adaptation capability is related to the presence of several myosin heavy chains (MHC). These express four types of pure fibers: I, IIA, IID and IIB containing MHCI, IIa, IId and IIb, respectively. Among pure fibers...

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Autores principales:	Ferreira,Alexandre, Campos,Gerson Eduardo Rocha
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2008
Materias:	Semitendinous muscle Muscle fibers Intermittent training Hypertrophy
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000100010
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spelling	oai:scielo:S0717-950220080001000102009-02-02Fiber Type Composition in Semitendinous Muscle of Wistar Rats and Effects of Intermittent Training on its HypertrophyFerreira,AlexandreCampos,Gerson Eduardo Rocha Semitendinous muscle Muscle fibers Intermittent training Hypertrophy Skeletal muscles respond to several stimuli changing their phenotype. Muscular fibers adaptation capability is related to the presence of several myosin heavy chains (MHC). These express four types of pure fibers: I, IIA, IID and IIB containing MHCI, IIa, IId and IIb, respectively. Among pure fibers, there are hybrid fibers, which can express two or more types of myosins. In this study, types of fibers constituting male Wistar rats semitendinous and their myosin heavy chains, as well as influence of intermittent training on hypertrophy of these fibers have been checked through MATPase histochemical technique and electrophoretic proteins separation. All types of pure and hybrid muscular fiber have been found, however the fibers of the types IIA, IID and IIB were predominant, featuring muscle as a fast-contracting one. Training has promoted muscular fibers transition with a significant increase of fibers of IC, IIAD and IIDB type. A cross-section increase of fibers of IIDB and IIB type has also been noticed. In summary, semitendinous muscle is essentially constituted by fast-contracting fibers and training could promote transition and hypertrophy of these fast fibers.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.26 n.1 20082008-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000100010en10.4067/S0717-95022008000100010
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Semitendinous muscle Muscle fibers Intermittent training Hypertrophy
spellingShingle	Semitendinous muscle Muscle fibers Intermittent training Hypertrophy Ferreira,Alexandre Campos,Gerson Eduardo Rocha Fiber Type Composition in Semitendinous Muscle of Wistar Rats and Effects of Intermittent Training on its Hypertrophy
description	Skeletal muscles respond to several stimuli changing their phenotype. Muscular fibers adaptation capability is related to the presence of several myosin heavy chains (MHC). These express four types of pure fibers: I, IIA, IID and IIB containing MHCI, IIa, IId and IIb, respectively. Among pure fibers, there are hybrid fibers, which can express two or more types of myosins. In this study, types of fibers constituting male Wistar rats semitendinous and their myosin heavy chains, as well as influence of intermittent training on hypertrophy of these fibers have been checked through MATPase histochemical technique and electrophoretic proteins separation. All types of pure and hybrid muscular fiber have been found, however the fibers of the types IIA, IID and IIB were predominant, featuring muscle as a fast-contracting one. Training has promoted muscular fibers transition with a significant increase of fibers of IC, IIAD and IIDB type. A cross-section increase of fibers of IIDB and IIB type has also been noticed. In summary, semitendinous muscle is essentially constituted by fast-contracting fibers and training could promote transition and hypertrophy of these fast fibers.
author	Ferreira,Alexandre Campos,Gerson Eduardo Rocha
author_facet	Ferreira,Alexandre Campos,Gerson Eduardo Rocha
author_sort	Ferreira,Alexandre
title	Fiber Type Composition in Semitendinous Muscle of Wistar Rats and Effects of Intermittent Training on its Hypertrophy
title_short	Fiber Type Composition in Semitendinous Muscle of Wistar Rats and Effects of Intermittent Training on its Hypertrophy
title_full	Fiber Type Composition in Semitendinous Muscle of Wistar Rats and Effects of Intermittent Training on its Hypertrophy
title_fullStr	Fiber Type Composition in Semitendinous Muscle of Wistar Rats and Effects of Intermittent Training on its Hypertrophy
title_full_unstemmed	Fiber Type Composition in Semitendinous Muscle of Wistar Rats and Effects of Intermittent Training on its Hypertrophy
title_sort	fiber type composition in semitendinous muscle of wistar rats and effects of intermittent training on its hypertrophy
publisher	Sociedad Chilena de Anatomía
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000100010
work_keys_str_mv	AT ferreiraalexandre fibertypecompositioninsemitendinousmuscleofwistarratsandeffectsofintermittenttrainingonitshypertrophy AT camposgersoneduardorocha fibertypecompositioninsemitendinousmuscleofwistarratsandeffectsofintermittenttrainingonitshypertrophy
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Fiber Type Composition in Semitendinous Muscle of Wistar Rats and Effects of Intermittent Training on its Hypertrophy

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