Electromyographic fatigue threshold of the biceps brachii: The effect of endurance time

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dc.contributor.authorOliveira, A. S C [UNESP]
dc.contributor.authorCardozo, A. C. [UNESP]
dc.contributor.authorBarbosa, F. S S [UNESP]
dc.contributor.authorGonçalves, M. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:22:23Z
dc.date.available2014-05-27T11:22:23Z
dc.date.issued2007-01-01
dc.description.abstractMuscle fatigue can be a limiting factor to determine index as the electromyographic fatigue threshold (EMGFT) due the alterations in motivation and disconfots. This way, the purpose of this study was to identify the right biceps brachii and left biceps brachii obtained from repetitive elbow flexions at each 10% of total time. Nine healthy subjects performed the exercise named biceps curl until exhaustion with 25%, 35%, and 45% of one repetition maximum, in three different days. EMG amplitude (root mean square - RMS) was obtained for concentric contractions during these load levels and correlated with time to determine the slope values for each load and them detemine the EMGFT. The EMGFT was obtained within of each 10% of total time and they were compared by analysis of variance. The results showed a progressive increase in RMS with time, for both muscles in all loads, characterizing the muscle fatigue process, and for the EMGFT values ware not found predominantly significant differences between the execution time, as well as between muscles (right biceps × left biceps). This protocol allowed to identify the EMGFT to both muscles during the biceps curl, which was similar at different percentage of total time, indicating the possibility to reduce the length of the contraction test without the need to maintain the contraction until exhaustion. Further studies are needed to evaluate the applicability of this method to determining the effects on performance.en
dc.description.affiliationLaboratory of Biomechanics Department of Physical Education Universidade Estadual Paulista, Rio Claro, São Paulo
dc.description.affiliation, Av. 24-A, no 1515 - Bela Vista, 13506-900 - Rio Claro - SP
dc.description.affiliationUnespLaboratory of Biomechanics Department of Physical Education Universidade Estadual Paulista, Rio Claro, São Paulo
dc.format.extent37-42
dc.identifier.citationElectromyography and Clinical Neurophysiology, v. 47, n. 1, p. 37-42, 2007.
dc.identifier.issn0301-150X
dc.identifier.lattes9812382668330744
dc.identifier.orcid0000-0001-9462-0240
dc.identifier.scopus2-s2.0-33847719870
dc.identifier.urihttp://hdl.handle.net/11449/69508
dc.language.isoeng
dc.relation.ispartofElectromyography and Clinical Neurophysiology
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectBiceps brachii
dc.subjectDynamic contraction
dc.subjectElectromyography
dc.subjectFatigue threshold
dc.subjectMuscle fatigue
dc.subjectadult
dc.subjectanalysis of variance
dc.subjectbiceps brachii muscle
dc.subjectclinical protocol
dc.subjectcontrolled study
dc.subjectelbow flexion
dc.subjectelectromyography
dc.subjectexhaustion
dc.subjecthuman
dc.subjecthuman experiment
dc.subjectmale
dc.subjectmuscle contraction
dc.subjectmuscle exercise
dc.subjectmuscle fatigue
dc.subjectmuscle function
dc.subjectnormal human
dc.subjecttime
dc.subjectAdult
dc.subjectArm
dc.subjectDifferential Threshold
dc.subjectExertion
dc.subjectHumans
dc.subjectMale
dc.subjectMuscle Fatigue
dc.subjectMuscle, Skeletal
dc.subjectPhysical Endurance
dc.subjectTime Factors
dc.subjectWeight Lifting
dc.titleElectromyographic fatigue threshold of the biceps brachii: The effect of endurance timeen
dc.typeArtigo
unesp.author.lattes9812382668330744[2]
unesp.author.orcid0000-0001-9462-0240[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Rio Claropt

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