Delayed onset of electromyographic activity of the vastus medialis relative to the vastus lateralis may be related to physical activity levels in females with patellofemoral pain

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dc.contributor.authorBriani, Ronaldo Valdir [UNESP]
dc.contributor.authorde Oliveira Silva, Danilo [UNESP]
dc.contributor.authorPazzinatto, Marcella Ferraz [UNESP]
dc.contributor.authorFerreira, Amanda Schenatto [UNESP]
dc.contributor.authorFerrari, Deisi
dc.contributor.authorde Azevedo, Fábio Mícolis [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2018-12-11T16:41:22Z
dc.date.available2018-12-11T16:41:22Z
dc.date.issued2016-02-01
dc.description.abstractThe aims of this study were to examine group differences in muscle activation onset of the vastus medialis (VM) in relation to the vastus lateralis (VL) and pain level during stair ascent in females with patellofemoral pain (PFP) who maintain high and moderate levels of physical activity; to determine the association between physical activity level and muscle activation onset. Forty-three females with PFP and thirty-eight pain-free females were recruited and divided into four groups based on their level of physical activity: females with PFP (n = 26) and pain-free females (n = 26) who practiced a moderate level of physical activity and females with PFP (n = 17) and pain-free females (n = 12) who practiced an intense amount of physical activity. Participants were asked to ascend a seven-step staircase and the VM and VL activation onset was determined. Females with PFP who practiced high level of physical activity demonstrated delayed onset of VM (4.06 ms) compared to healthy females (-14.4 ms). Conversely, females with PFP who practiced moderate level of physical activity did not present VM delay (-2.48 ms) in comparison to healthy females (-9.89 ms). Furthermore, physical activity significantly correlated to the muscle activation onset difference (p = 0.005; R = 0.60). These findings may explain why controversial results regarding VM and VL muscle activation onset have been found.en
dc.description.affiliationDepartment of Physiotherapy University of State of Sao Paulo UNESP
dc.description.affiliationDepartment of Bioengineering University of São Paulo USP
dc.description.affiliationUnespDepartment of Physiotherapy University of State of Sao Paulo UNESP
dc.format.extent137-142
dc.identifierhttp://dx.doi.org/10.1016/j.jelekin.2015.10.012
dc.identifier.citationJournal of Electromyography and Kinesiology, v. 26, p. 137-142.
dc.identifier.doi10.1016/j.jelekin.2015.10.012
dc.identifier.file2-s2.0-84960299194.pdf
dc.identifier.issn1873-5711
dc.identifier.issn1050-6411
dc.identifier.scopus2-s2.0-84960299194
dc.identifier.urihttp://hdl.handle.net/11449/168461
dc.language.isoeng
dc.relation.ispartofJournal of Electromyography and Kinesiology
dc.relation.ispartofsjr0,778
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectKnee pain
dc.subjectMuscle activity
dc.subjectOnset
dc.subjectQuadriceps
dc.titleDelayed onset of electromyographic activity of the vastus medialis relative to the vastus lateralis may be related to physical activity levels in females with patellofemoral painen
dc.typeArtigo

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