Test-retest reliability of electromyographic signal parameters used to evaluate neuromuscular fatigue in quadriceps femoris muscle

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dc.contributor.authorda Silva, Cristiano Rocha [UNESP]
dc.contributor.authorde Oliveira Silva, Danilo [UNESP]
dc.contributor.authorBriani, Ronaldo Valdir [UNESP]
dc.contributor.authorPazzinatto, Marcella Ferraz [UNESP]
dc.contributor.authorFerrari, Deisi [UNESP]
dc.contributor.authorde Azevedo, Fábio Mícolis [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2018-12-11T16:45:17Z
dc.date.available2018-12-11T16:45:17Z
dc.date.issued2016-12-01
dc.description.abstractThe purpose of this study was to analyze the test-retest reliability of the median frequency (MDF) and root mean square (RMS) used to determine the onset of neuromuscular fatigue (NF) during sustained fatiguing contractions of the quadriceps. Eighteen healthy men were tested on two days, and electromyographic (EMG) signals were recorded from the vastus medialis (VM), rectus femoris (RF) and vastus lateralis (VL) during sustained isometric contractions at 20 and 70% of maximum voluntary contractions (MVC) held until exhaustion. The reliability of endurance time was excellent at 20% MVC and poor at 70% MVC. EMG variables were evaluated: (1) at the beginning of the test; (2) at NF; and (3) at the end of the test. The NF time values presented poor reliability. The MDF has shown, in general, poor reliability at 20 and 70% MVC, whereas the RMS reliability presented better results for both loads, especially for RF, followed by the VM and VL muscles. The MDF and RMS values extracted from NF showed poor reliability at 20 and 70% MVC, which suggests caution in using these variables extracted from the EMG signal to determine the onset of NF.en
dc.description.affiliationLaboratory of Biomechanics and Motor Control FCT/UNESP
dc.description.affiliationBiomedical Engineering Laboratory Univ. of São Paulo EPUSP PTC
dc.description.affiliationUniversity of São Paulo EESC/FMRP IQSC-USP
dc.description.affiliationUnespLaboratory of Biomechanics and Motor Control FCT/UNESP
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2008/11639-4
dc.format.extent174-181
dc.identifier.citationKinesiology, v. 48, n. 2, p. 174-181, 2016.
dc.identifier.issn1331-1441
dc.identifier.scopus2-s2.0-85007499753
dc.identifier.urihttp://hdl.handle.net/11449/169303
dc.language.isoeng
dc.relation.ispartofKinesiology
dc.relation.ispartofsjr0,437
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectElectromyography
dc.subjectIsometric contraction
dc.subjectQuadriceps muscle
dc.subjectReliability
dc.subjectReproducibility of results
dc.titleTest-retest reliability of electromyographic signal parameters used to evaluate neuromuscular fatigue in quadriceps femoris muscleen
dc.typeArtigo

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