The effects of priming exercise on the (V)over dotO(2) slow component and the time-course of muscle fatigue during very-heavy-intensity exercise in humans

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dc.contributor.authorNascimento Salvador, Paulo Cesar do
dc.contributor.authorSouza, Kristopher Mendes de
dc.contributor.authorDe Lucas, Ricardo Dantas
dc.contributor.authorAntonacci Guglielmo, Luiz Guilherme
dc.contributor.authorDenadai, Benedito Sergio [UNESP]
dc.contributor.institutionUniversidade Federal de Santa Catarina (UFSC)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-11-26T17:55:12Z
dc.date.available2018-11-26T17:55:12Z
dc.date.issued2018-09-01
dc.description.abstractWe hypothesized that prior exercise would attenuate the muscle fatigue accompanied by oxygen uptake slow-component ((V)over dotO(2SC)) behavior during a subsequent very-heavy (VH)-intensity cycling exercise. Thirteen healthy male subjects performed tests to determine the critical power (CP) and the fixed amount of work above CP (W') and performed 6 square-wave bouts until 3 or 8 min, each at a work rate set to deplete 70% W' in 8 min, with a maximal isokinetic effort before and after the conditions without (VHCON) and with prior exercise (VHEXP), to measure the cycling peak torque decrement. The (V)over dotO(2SC) magnitude at 3 min (VHCON = 0.280 +/- 0.234, VHEXP, = 0.116 +/- 0.109 L.min(-1) ;p = 0.04) and the (V)over dotO(2SC) trajectory were significantly lower for VHEXP (VHCON = 0.108 +/- 0.042, VHEXP= 0.063 +/- 0.0311:min(-2);p < 0.01), leading to a (V)over dotO(2SC) magnitude at the eighth minute that was significantly lower than VHCON (VHCON = 0.626 +/- 0.296 L.min(-1), VHEXP = 0.337 +/- 0.179; p < 0.01). Conversely, peak torque progressively decreased from pre-exercise to 3 min (Delta torque = 21.5 +/- 7.7 vs. 19.6 +/- 9.2 Nm) and to 8 min (Delta torque = 29.4 +/- 15.8 vs. 27.5 +/- 12.0 Nm) at V-CON and VHEXP, respectively, without significant differences between conditions. Regardless of the condition, there was a significant relationship between Delta torque and the (V)over dotO(2SC) (R-2 : VHCON = 0.23. VHEXP = 0.25; p = 0.01). Considering that priming effects on the (V)over dotO(2SC) were not accompanied by the muscle force behavior, these findings do not support the hypothesis of a causal relationship between the time-course of muscle fatigue and (V)over dotO(2SC).en
dc.description.affiliationUniv Fed Santa Catarina, Sports Ctr, Phys Effort Lab, BR-88040900 Florianopolis, SC, Brazil
dc.description.affiliationSao Paulo State Univ, Human Performance Lab, BR-13506900 Rio Claro, Brazil
dc.description.affiliationUnespSao Paulo State Univ, Human Performance Lab, BR-13506900 Rio Claro, Brazil
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extent909-919
dc.identifierhttp://dx.doi.org/10.1139/apnm-2017-0769
dc.identifier.citationApplied Physiology Nutrition And Metabolism. Ottawa: Canadian Science Publishing, Nrc Research Press, v. 43, n. 9, p. 909-919, 2018.
dc.identifier.doi10.1139/apnm-2017-0769
dc.identifier.issn1715-5312
dc.identifier.urihttp://hdl.handle.net/11449/164586
dc.identifier.wosWOS:000443136700007
dc.language.isoeng
dc.publisherCanadian Science Publishing, Nrc Research Press
dc.relation.ispartofApplied Physiology Nutrition And Metabolism
dc.relation.ispartofsjr1,112
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectpriming exercise
dc.subjectslow component of oxygen uptake
dc.subject(V)over dot O-2 kinetics
dc.subjectmuscle force production
dc.subjecthigh-intensity exercise
dc.titleThe effects of priming exercise on the (V)over dotO(2) slow component and the time-course of muscle fatigue during very-heavy-intensity exercise in humansen
dc.typeArtigo
dcterms.rightsHolderCanadian Science Publishing, Nrc Research Press
unesp.author.lattes1907479250833033[5]
unesp.author.orcid0000-0003-0775-1889[5]

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