Sex differences in muscle fatigue following isokinetic muscle contractions

Abstract Muscle fatigue is a limiting factor of human performance. It is unclear whether sex-based differences in fatigability exist during dynamic exercise of varying velocities of contraction. We aimed at exploring sex differences in muscle fatigue elicited by maximal isokinetic muscle contraction...

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Autores principales:	Miguel Gomes, Paulo Santos, Paulo Correia, Pedro Pezarat-Correia, Goncalo V. Mendonca
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3408c977987a41fab22f95bfd814a683
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spelling	oai:doaj.org-article:3408c977987a41fab22f95bfd814a6832021-12-02T18:02:47ZSex differences in muscle fatigue following isokinetic muscle contractions10.1038/s41598-021-87443-02045-2322https://doaj.org/article/3408c977987a41fab22f95bfd814a6832021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87443-0https://doaj.org/toc/2045-2322Abstract Muscle fatigue is a limiting factor of human performance. It is unclear whether sex-based differences in fatigability exist during dynamic exercise of varying velocities of contraction. We aimed at exploring sex differences in muscle fatigue elicited by maximal isokinetic muscle contractions performed at different angular velocities. Twenty-six healthy participants (13 men: 23.2 ± 1.5; 13 women: 21.9 ± 3.0 years) were tested for concentric knee-extension at slow, moderate and fast angular isokinetic velocity (60, 180 and 300º.s−1, respectively), on non-consecutive days. The impact of sex on fatigue resistance and consecutive recovery for each isokinetic condition was explored by calculating the percent change in maximal voluntary isometric contraction (MVIC) and in rate of torque development (RTD), from pre- to post-isokinetic exercise (30 repetitions). The isokinetic fatigue index was also determined. No sex differences were obtained in response to isokinetic contractions completed at 60º.s−1. After performing muscle contractions at 300º.s−1, women had a significantly greater loss in MVIC than men (− 18.4 ± 5.5 vs. − 12.9 ± 3.8%; p = 0.009) and larger decreases in work output during isokinetic exercise (− 34.2 ± 8.9 vs − 27.5 ± 10.6%; p = 0.017). Recovery of initial MVIC strength was greater for women post-exercise at 180º.s−1 (15.6 ± 4.1% vs. 6.7 ± 9.5; p = 0.003). No differences were found between sexes in any condition for RTD from pre- to post-fatigue. These results suggest the presence of a sexually dimorphic fatigability in response to dynamic (isokinetic) contractions favouring men at higher absolute velocities of contraction.Miguel GomesPaulo SantosPaulo CorreiaPedro Pezarat-CorreiaGoncalo V. MendoncaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Miguel Gomes Paulo Santos Paulo Correia Pedro Pezarat-Correia Goncalo V. Mendonca Sex differences in muscle fatigue following isokinetic muscle contractions
description	Abstract Muscle fatigue is a limiting factor of human performance. It is unclear whether sex-based differences in fatigability exist during dynamic exercise of varying velocities of contraction. We aimed at exploring sex differences in muscle fatigue elicited by maximal isokinetic muscle contractions performed at different angular velocities. Twenty-six healthy participants (13 men: 23.2 ± 1.5; 13 women: 21.9 ± 3.0 years) were tested for concentric knee-extension at slow, moderate and fast angular isokinetic velocity (60, 180 and 300º.s−1, respectively), on non-consecutive days. The impact of sex on fatigue resistance and consecutive recovery for each isokinetic condition was explored by calculating the percent change in maximal voluntary isometric contraction (MVIC) and in rate of torque development (RTD), from pre- to post-isokinetic exercise (30 repetitions). The isokinetic fatigue index was also determined. No sex differences were obtained in response to isokinetic contractions completed at 60º.s−1. After performing muscle contractions at 300º.s−1, women had a significantly greater loss in MVIC than men (− 18.4 ± 5.5 vs. − 12.9 ± 3.8%; p = 0.009) and larger decreases in work output during isokinetic exercise (− 34.2 ± 8.9 vs − 27.5 ± 10.6%; p = 0.017). Recovery of initial MVIC strength was greater for women post-exercise at 180º.s−1 (15.6 ± 4.1% vs. 6.7 ± 9.5; p = 0.003). No differences were found between sexes in any condition for RTD from pre- to post-fatigue. These results suggest the presence of a sexually dimorphic fatigability in response to dynamic (isokinetic) contractions favouring men at higher absolute velocities of contraction.
format	article
author	Miguel Gomes Paulo Santos Paulo Correia Pedro Pezarat-Correia Goncalo V. Mendonca
author_facet	Miguel Gomes Paulo Santos Paulo Correia Pedro Pezarat-Correia Goncalo V. Mendonca
author_sort	Miguel Gomes
title	Sex differences in muscle fatigue following isokinetic muscle contractions
title_short	Sex differences in muscle fatigue following isokinetic muscle contractions
title_full	Sex differences in muscle fatigue following isokinetic muscle contractions
title_fullStr	Sex differences in muscle fatigue following isokinetic muscle contractions
title_full_unstemmed	Sex differences in muscle fatigue following isokinetic muscle contractions
title_sort	sex differences in muscle fatigue following isokinetic muscle contractions
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/3408c977987a41fab22f95bfd814a683
work_keys_str_mv	AT miguelgomes sexdifferencesinmusclefatiguefollowingisokineticmusclecontractions AT paulosantos sexdifferencesinmusclefatiguefollowingisokineticmusclecontractions AT paulocorreia sexdifferencesinmusclefatiguefollowingisokineticmusclecontractions AT pedropezaratcorreia sexdifferencesinmusclefatiguefollowingisokineticmusclecontractions AT goncalovmendonca sexdifferencesinmusclefatiguefollowingisokineticmusclecontractions
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Sex differences in muscle fatigue following isokinetic muscle contractions

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