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dc.contributor.authorOwen, Patrick J.
dc.contributor.authorRantalainen, Timo
dc.contributor.authorScheuring, Richard A.
dc.contributor.authorBelavy, Daniel L.
dc.date.accessioned2019-10-01T12:55:24Z
dc.date.available2019-10-01T12:55:24Z
dc.date.issued2019
dc.identifier.citationOwen, P. J., Rantalainen, T., Scheuring, R. A., & Belavy, D. L. (2019). Serratus anterior contraction during resisted arm extension (GravityFit) assessed by MRI. <i>Frontiers in Physiology</i>, <i>10</i>, Article 1164. <a href="https://doi.org/10.3389/fphys.2019.01164" target="_blank">https://doi.org/10.3389/fphys.2019.01164</a>
dc.identifier.otherCONVID_33072837
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/65703
dc.description.abstractBackground: Scapular stabilization is a common focus of shoulder rehabilitation. Objective: Examine contraction of serratus anterior during a bilateral arm extension exercise with axial compression using an exercise device (GravityFit) by magnetic resonance imaging (MRI). Methods: MRI was performed under two conditions: rest and static arm extension with axial compression. Load was set at 20% of age, sex and weight estimated bench press one-repetition maximum. A T2-weighted sequence was used to collect 14 axial images of the upper thoracic spine and shoulder bilaterally. Mean muscle length and thickness were calculated for the whole muscle and in equidistant subregions of the muscle in its anterior (superficial), central and posterior (deep) portions. Adjustment of p-values to guard against false positives was performed via the false discovery rate method. Results: Nine participants without a history of shoulder or spine pathology were included. When compared to rest, arm extension with the exercise device led to 11% increased overall muscle thickness (P = 0.038) and 6.1% decreased overall muscle length (P = 0.010). Regionally, thickness increased in anterior (superficial, +19%; P = 0.040) and central (+17%; P = 0.028) portions of the muscle more than posterior (deep, +3.9%, P = 0.542). Conclusion: Contraction of serratus anterior occurred during static arm extension with axial compression produced by a novel exercise approach, as measured via MRI. The activation of serratus anterior differed across its length with greater contraction of the anterior and central portions. This may indicate compartmentalization of function within this muscle. Overall, the proof-of-principle findings justify the use of this exercise approach for the activation of serratus anterior.en
dc.format.mimetypeapplication/pdf
dc.languageeng
dc.language.isoeng
dc.publisherFrontiers Media
dc.relation.ispartofseriesFrontiers in Physiology
dc.rightsCC BY 4.0
dc.subject.othermuscle
dc.subject.otherexercise
dc.subject.otherrehabilitation
dc.subject.otherphysiotherapy
dc.subject.otherphysical therapy
dc.subject.otherupper extremity
dc.titleSerratus anterior contraction during resisted arm extension (GravityFit) assessed by MRI
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201910014291
dc.contributor.laitosLiikuntatieteellinen tiedekuntafi
dc.contributor.laitosFaculty of Sport and Health Sciencesen
dc.contributor.oppiaineBiomekaniikkafi
dc.contributor.oppiaineBiomechanicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.description.reviewstatuspeerReviewed
dc.relation.issn1664-042X
dc.relation.volume10
dc.type.versionpublishedVersion
dc.rights.copyright© 2019 The Authors
dc.rights.accesslevelopenAccessfi
dc.subject.ysofysioterapia
dc.subject.ysokuntoutus
dc.subject.ysomagneettikuvaus
dc.subject.ysovoimaharjoittelu
dc.subject.ysolihakset
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p10515
jyx.subject.urihttp://www.yso.fi/onto/yso/p3320
jyx.subject.urihttp://www.yso.fi/onto/yso/p12131
jyx.subject.urihttp://www.yso.fi/onto/yso/p16233
jyx.subject.urihttp://www.yso.fi/onto/yso/p2784
dc.rights.urlhttps://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.3389/fphys.2019.01164
jyx.fundinginformationThis work was supported by GravityFit (Grant Number: RM32446), manufacturer of the exercise device used in testing.


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