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dc.contributor.authorda Silva Carvalho, Rodrigo Gustavo
dc.contributor.authorAmorim, Cesar Ferreira [UNESP]
dc.contributor.authorRossi Peracio, Luis Henrique
dc.contributor.authorCoelho, Helder Figueiredo
dc.contributor.authorVieira, Andre Carleone
dc.contributor.authorMenzel, Hans-Joachim Karl
dc.contributor.authorSzmuchrowski, Leszek Antoni
dc.identifier.citationJournal of Electromyography and Kinesiology. Oxford: Elsevier B.V., v. 20, n. 5, p. 988-993, 2010.
dc.description.abstractThe aim of this study was to verify if there are differences in the amplitude of signals from surface electromyography (EMG) during maximal and submaximal voluntary isometric contraction (MVC and 50% MVC, respectively) under different conditions, in our case, water and air, with and without extra protection (water-resistant tape) on the electrode. The isometric force and muscle activation of the MVC and 50% MVC of the biceps brachial muscle of nine healthy trained men were measured simultaneously, performed in water and on air, with and without protection of the EMG electrode. The multivariate analysis of variance with a post hoc Tukey test was applied to detect significant differences between the levels of muscular force. For the amplitude values of the EMG signal, the Wilcoxon signed rank test was applied to compare all experimental conditions in order to detect a significance of p < 0.05. The values of isometric force were not significantly different among conditions (MVC and 50% MVC). The results showed a significant difference among conditions in the water without extra protection compared to the conditions on air with and without extra protection and in water with extra protection. Reduced EMG amplitude was seen in water without extra protection from 37.04% to 55.81% regarding the other conditions. However, no significant difference was seen among conditions in water with extra protection in relation the conditions on air (with and without extra protection). This study suggest that it is necessary to use a water-resistant tape as an extra protection on the electrode when using EMG underwater, to avoid having a significant decrease in the EMG amplitude underwater and not to suffer interference from the water. There was no significant difference among the recordings of EMG with and without the use of protection on air; therefore, the protection does not influence the recording of EMG amplitude and isometric force on air. (C) 2009 Elsevier Ltd. All rights reserved.en
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Electromyography and Kinesiology
dc.sourceWeb of Science
dc.subjectIsometric forceen
dc.subjectEMG signal amplitudeen
dc.subjectEMG water recordingen
dc.titleAnalysis of various conditions in order to measure electromyography of isometric contractions in water and on airen
dcterms.rightsHolderElsevier B.V.
dc.contributor.institutionUniversidade Federal de Minas Gerais (UFMG)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.description.affiliationUniversidade Federal de Minas Gerais (UFMG), Sch Phys Educ Physiotherapy & Occupat Therapy, EEFFTO, Dept Sports,Lab Load Evaluat, BR-31270901 Belo Horizonte, MG, Brazil
dc.description.affiliationSão Paulo State Univ, Dept Mech Engn, Sch Mech Engn, UNESP FEG, São Paulo, Brazil
dc.description.affiliationUniversidade Federal de Minas Gerais (UFMG), Sch Phys Educ Physiotherapy & Occupat Therapy, Dept Sports, Lab Sport Biomech, BR-31270901 Belo Horizonte, MG, Brazil
dc.description.affiliationUniversidade Federal de Minas Gerais (UFMG), Dept Mech Engn, Sch Mech Engn, Bioengn Lab, BR-31270901 Belo Horizonte, MG, Brazil
dc.description.affiliationUnespSão Paulo State Univ, Dept Mech Engn, Sch Mech Engn, UNESP FEG, São Paulo, Brazil
dc.rights.accessRightsAcesso restrito
dc.description.sponsorshipIdCNPq: 123854/2008-3
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Engenharia, Guaratinguetápt[1]
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