Force depression following a stretch-shortening cycle is independent of stretch peak force and work performed during shortening

Abstract The steady-state isometric force following active muscle shortening or lengthening is smaller (force depression; FD) or greater (residual force enhancement; RFE) than a purely isometric contraction at the corresponding length. The mechanisms behind these phenomena remain not fully understoo...

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Autores principales:	Rafael Fortuna, Hannah Kirchhuebel, Wolfgang Seiberl, Geoffrey A. Power, Walter Herzog
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ecc32b5b385e41cb8368b71137ca35d9
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spelling	oai:doaj.org-article:ecc32b5b385e41cb8368b71137ca35d92021-12-02T15:09:01ZForce depression following a stretch-shortening cycle is independent of stretch peak force and work performed during shortening10.1038/s41598-018-19657-82045-2322https://doaj.org/article/ecc32b5b385e41cb8368b71137ca35d92018-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-19657-8https://doaj.org/toc/2045-2322Abstract The steady-state isometric force following active muscle shortening or lengthening is smaller (force depression; FD) or greater (residual force enhancement; RFE) than a purely isometric contraction at the corresponding length. The mechanisms behind these phenomena remain not fully understood, with few studies investigating the effects of FD and RFE in stretch-shortening cycles (SSC). The purpose of this study was to investigate the influence of RFE and peak force at the end of the stretch phase on the steady-state isometric force following shortening. Isometric thumb adduction force measurements were preceded by an isometric, a shortening contraction to induce FD, and SSCs at different stretch speeds (15°/s, 60°/s, and 120°/s). The different peak force values at the end of stretch and the different amounts of work performed during shortening did not influence the steady-state isometric force at the end of the SSC. We conclude that the FD following SSC depends exclusively on the amount of RFE established in the initial stretch phase in situations where the timing and contractile conditions of the shortening phase are kept constant .Rafael FortunaHannah KirchhuebelWolfgang SeiberlGeoffrey A. PowerWalter HerzogNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-8 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Rafael Fortuna Hannah Kirchhuebel Wolfgang Seiberl Geoffrey A. Power Walter Herzog Force depression following a stretch-shortening cycle is independent of stretch peak force and work performed during shortening
description	Abstract The steady-state isometric force following active muscle shortening or lengthening is smaller (force depression; FD) or greater (residual force enhancement; RFE) than a purely isometric contraction at the corresponding length. The mechanisms behind these phenomena remain not fully understood, with few studies investigating the effects of FD and RFE in stretch-shortening cycles (SSC). The purpose of this study was to investigate the influence of RFE and peak force at the end of the stretch phase on the steady-state isometric force following shortening. Isometric thumb adduction force measurements were preceded by an isometric, a shortening contraction to induce FD, and SSCs at different stretch speeds (15°/s, 60°/s, and 120°/s). The different peak force values at the end of stretch and the different amounts of work performed during shortening did not influence the steady-state isometric force at the end of the SSC. We conclude that the FD following SSC depends exclusively on the amount of RFE established in the initial stretch phase in situations where the timing and contractile conditions of the shortening phase are kept constant .
format	article
author	Rafael Fortuna Hannah Kirchhuebel Wolfgang Seiberl Geoffrey A. Power Walter Herzog
author_facet	Rafael Fortuna Hannah Kirchhuebel Wolfgang Seiberl Geoffrey A. Power Walter Herzog
author_sort	Rafael Fortuna
title	Force depression following a stretch-shortening cycle is independent of stretch peak force and work performed during shortening
title_short	Force depression following a stretch-shortening cycle is independent of stretch peak force and work performed during shortening
title_full	Force depression following a stretch-shortening cycle is independent of stretch peak force and work performed during shortening
title_fullStr	Force depression following a stretch-shortening cycle is independent of stretch peak force and work performed during shortening
title_full_unstemmed	Force depression following a stretch-shortening cycle is independent of stretch peak force and work performed during shortening
title_sort	force depression following a stretch-shortening cycle is independent of stretch peak force and work performed during shortening
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/ecc32b5b385e41cb8368b71137ca35d9
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_version_	1718387972742578176

Force depression following a stretch-shortening cycle is independent of stretch peak force and work performed during shortening

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