Oxygen consumption of gastrocnemius medialis muscle during submaximal voluntary isometric contractions with and without preceding stretch

Abstract After an active muscle stretch, maintaining a certain amount of force in the following isometric phase is accompanied by less muscle activation compared to an isometric contraction without preceding active stretch at the corresponding muscle length. This reduced muscle activation might be r...

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Autores principales:	F. K. Paternoster, D. Hahn, F. Stöcker, A. Schwirtz, W. Seiberl
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/bf780898aa8d4ab9b7e6936a0c233d62
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spelling	oai:doaj.org-article:bf780898aa8d4ab9b7e6936a0c233d622021-12-02T12:32:13ZOxygen consumption of gastrocnemius medialis muscle during submaximal voluntary isometric contractions with and without preceding stretch10.1038/s41598-017-04068-y2045-2322https://doaj.org/article/bf780898aa8d4ab9b7e6936a0c233d622017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04068-yhttps://doaj.org/toc/2045-2322Abstract After an active muscle stretch, maintaining a certain amount of force in the following isometric phase is accompanied by less muscle activation compared to an isometric contraction without preceding active stretch at the corresponding muscle length. This reduced muscle activation might be related to reduced metabolic costs, such as the oxidative metabolism. Hence, the aim of this study was to clarify if mechanisms associated with stretch-induced activation reduction (AR) also influence oxygen consumption of voluntary activated human muscles after active stretch. Plantarflexion torque of 20 subjects was measured during 1) purely isometric and 2) active stretch contractions (26°, 60°/s), at a submaximal torque level of 30% MVC. Oxygen consumption (m $$\dot{\rm{V}}$$ V · O2) of gastrocnemius medialis (GM) was estimated by near-infrared spectroscopy while applying arterial occlusion. Since the overall group did not show AR at GM after active stretch (p > 0.19), a subgroup was defined (n = 10) showing AR of 13.0 ± 10.3% (p = 0.00). However, for both purely isometric and active contractions m $$\dot{\rm{V}}$$ V · O2 was the same (p = 0.32). Therefore, AR triggered by active stretch did not affect m $$\dot{\rm{V}}$$ V · O2 of active human muscle.F. K. PaternosterD. HahnF. StöckerA. SchwirtzW. SeiberlNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q F. K. Paternoster D. Hahn F. Stöcker A. Schwirtz W. Seiberl Oxygen consumption of gastrocnemius medialis muscle during submaximal voluntary isometric contractions with and without preceding stretch
description	Abstract After an active muscle stretch, maintaining a certain amount of force in the following isometric phase is accompanied by less muscle activation compared to an isometric contraction without preceding active stretch at the corresponding muscle length. This reduced muscle activation might be related to reduced metabolic costs, such as the oxidative metabolism. Hence, the aim of this study was to clarify if mechanisms associated with stretch-induced activation reduction (AR) also influence oxygen consumption of voluntary activated human muscles after active stretch. Plantarflexion torque of 20 subjects was measured during 1) purely isometric and 2) active stretch contractions (26°, 60°/s), at a submaximal torque level of 30% MVC. Oxygen consumption (m $$\dot{\rm{V}}$$ V · O2) of gastrocnemius medialis (GM) was estimated by near-infrared spectroscopy while applying arterial occlusion. Since the overall group did not show AR at GM after active stretch (p > 0.19), a subgroup was defined (n = 10) showing AR of 13.0 ± 10.3% (p = 0.00). However, for both purely isometric and active contractions m $$\dot{\rm{V}}$$ V · O2 was the same (p = 0.32). Therefore, AR triggered by active stretch did not affect m $$\dot{\rm{V}}$$ V · O2 of active human muscle.
format	article
author	F. K. Paternoster D. Hahn F. Stöcker A. Schwirtz W. Seiberl
author_facet	F. K. Paternoster D. Hahn F. Stöcker A. Schwirtz W. Seiberl
author_sort	F. K. Paternoster
title	Oxygen consumption of gastrocnemius medialis muscle during submaximal voluntary isometric contractions with and without preceding stretch
title_short	Oxygen consumption of gastrocnemius medialis muscle during submaximal voluntary isometric contractions with and without preceding stretch
title_full	Oxygen consumption of gastrocnemius medialis muscle during submaximal voluntary isometric contractions with and without preceding stretch
title_fullStr	Oxygen consumption of gastrocnemius medialis muscle during submaximal voluntary isometric contractions with and without preceding stretch
title_full_unstemmed	Oxygen consumption of gastrocnemius medialis muscle during submaximal voluntary isometric contractions with and without preceding stretch
title_sort	oxygen consumption of gastrocnemius medialis muscle during submaximal voluntary isometric contractions with and without preceding stretch
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/bf780898aa8d4ab9b7e6936a0c233d62
work_keys_str_mv	AT fkpaternoster oxygenconsumptionofgastrocnemiusmedialismuscleduringsubmaximalvoluntaryisometriccontractionswithandwithoutprecedingstretch AT dhahn oxygenconsumptionofgastrocnemiusmedialismuscleduringsubmaximalvoluntaryisometriccontractionswithandwithoutprecedingstretch AT fstocker oxygenconsumptionofgastrocnemiusmedialismuscleduringsubmaximalvoluntaryisometriccontractionswithandwithoutprecedingstretch AT aschwirtz oxygenconsumptionofgastrocnemiusmedialismuscleduringsubmaximalvoluntaryisometriccontractionswithandwithoutprecedingstretch AT wseiberl oxygenconsumptionofgastrocnemiusmedialismuscleduringsubmaximalvoluntaryisometriccontractionswithandwithoutprecedingstretch
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Oxygen consumption of gastrocnemius medialis muscle during submaximal voluntary isometric contractions with and without preceding stretch

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