Effect of 808 nm low-level laser therapy in exercise-induced skeletal muscle fatigue in elderly women

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dc.contributor.authorToma, Renata Luri
dc.contributor.authorTucci, Helga Tatiana
dc.contributor.authorMoreira Antunes, Hanna Karen
dc.contributor.authorPedroni, Cristiane Rodrigues [UNESP]
dc.contributor.authorOliveira, Anamaria Siriani de
dc.contributor.authorBuck, Isabela
dc.contributor.authorFerreira, Pryscilla Dieguez
dc.contributor.authorVassao, Patricia Gabrielle
dc.contributor.authorMuniz Renno, Ana Claudia
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-12-03T13:07:00Z
dc.date.available2014-12-03T13:07:00Z
dc.date.issued2013-09-01
dc.description.abstractAging process involves several structural changes in muscle tissue which lead to decrease in musculoskeletal function. One of the most common physiological modifications is the increase in fatigability in elderly people, which leads to inability to maintain strength and motor control. In this context, low-level laser therapy (LLLT) has demonstrated positive results in reducing fatigue during physical exercise. Thus, this study aimed to investigate the effects of LLLT on skeletal muscle fatigue in elderly women. Twenty-four subjects divided in two groups entered a crossover randomized triple-blinded placebo-controlled trial. Active LLLT (808 nm wavelength, 100 mW, energy 7 J) or an identical placebo LLLT was delivered on the rectus femoris muscle immediately before a fatigue protocol. Subjects performed a fatigue protocol which consisted of voluntary isotonic contractions of knee flexion-extension performed with a load corresponding to 75 % of 1-MR (Maximum Repetition) during 60 s. Surface electromyography (SEMG) signals were recorded from rectus femoris muscle of dominant lower limb to evaluate peripheral fatigability using median frequency analysis of SEMG signal. The number of repetitions of flexion-extension during fatigue protocol was also compared between groups. The values of median frequency were used to calculate the slope coefficient. The results showed no difference in the slope comparing placebo LLLT and active LLLT groups (p = 0.293). However, a significant difference was observed in the number of repetitions between groups, after active LLLT, subjects demonstrated significantly higher number of repetitions (p = 0.047). In this study, LLLT was efficient in increasing the mean number of repetitions during knee flexion-extension exercise, although results have not shown delay electromyographic fatigue.en
dc.description.affiliationUniv Fed Sao Paulo, Dept Biosci, BR-11060001 Sao Paulo, Brazil
dc.description.affiliationUniv Fed Sao Paulo, Dept Human Movement Sci, BR-11060001 Sao Paulo, Brazil
dc.description.affiliationUniv Estadual Paulista, Dept Phys Therapy, BR-17525900 Sao Paulo, Brazil
dc.description.affiliationUniv Sao Paulo, Fac Med Ribeirao Preto, BR-14049900 Sao Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Phys Therapy, BR-17525900 Sao Paulo, Brazil
dc.description.sponsorshipDepartment of Biosciences of the Federal University of Sao Paulo
dc.description.sponsorshipUniversity of Estadual Paulista Julio de Mesquita Filho
dc.description.sponsorshipSao Paulo University
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extent1375-1382
dc.identifierhttp://dx.doi.org/10.1007/s10103-012-1246-5
dc.identifier.citationLasers In Medical Science. London: Springer London Ltd, v. 28, n. 5, p. 1375-1382, 2013.
dc.identifier.doi10.1007/s10103-012-1246-5
dc.identifier.issn0268-8921
dc.identifier.lattes2252907234602497
dc.identifier.orcid0000-0001-6907-3345
dc.identifier.urihttp://hdl.handle.net/11449/111162
dc.identifier.wosWOS:000323742200020
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofLasers in Medical Science
dc.relation.ispartofjcr1.949
dc.relation.ispartofsjr0,713
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectLow-level laser therapyen
dc.subjectMuscle fatigueen
dc.subjectSEMGen
dc.subjectAgingen
dc.subjectMuscular performanceen
dc.titleEffect of 808 nm low-level laser therapy in exercise-induced skeletal muscle fatigue in elderly womenen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
unesp.author.lattes2252907234602497[4]
unesp.author.orcid0000-0001-6907-3345[4]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Filosofia e Ciências, Maríliapt

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