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dc.contributor.authorSano, Kanae
dc.contributor.authorSakamoto, Takumi
dc.contributor.authorNishimura, Ryoma
dc.contributor.authorDanno, Yoshito
dc.contributor.authorKomi, Paavo V.
dc.contributor.authorIshikawa, Masaki
dc.date.accessioned2019-10-11T12:00:04Z
dc.date.available2019-10-11T12:00:04Z
dc.date.issued2019
dc.identifier.citationSano, K., Sakamoto, T., Nishimura, R., Danno, Y., Komi, P. V., & Ishikawa, M. (2019). Muscle-Tendon Interaction During Human Dolphin-Kick Swimming. <i>Frontiers in Physiology</i>, <i>10</i>, Article 1153. <a href="https://doi.org/10.3389/fphys.2019.01153" target="_blank">https://doi.org/10.3389/fphys.2019.01153</a>
dc.identifier.otherCONVID_33181300
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/65823
dc.description.abstractWithout high impact forces, it is not clear how humans can utilize tendon elasticity during low-impact activities. The purpose of the present study was to examine the muscle-tendon behavior together with the electromyographic (EMG) activities of the vastus lateralis (VL) muscle during the human dolphin-kicking. In a swimming pool, each subject (n = 11) swam the 25 m dolphin-kicking at two different speeds (NORMAL and FAST). Surface EMGs were recorded from the VL and biceps femoris (BF) muscles. Simultaneous recordings of the knee joint angle by electro-goniometer and of the VL fascicle length by ultrasonography were used to calculate the muscle-tendon unit and tendinous length of VL(L-MTU and L-TT, respectively). In the dolphin-kicking, the stretching and shortening amplitudes of VL L-MTU did not differ significantly between the two kicking speed conditions. However, both stretching and shortening amplitudes of the VL fascicle length were lower at FAST than at NORMAL speed whereas the opposite was found for the VL L-TT values. At FAST, the contribution of the VLfascicle length to the entire VLMTU length changes increased. The EMG analysis revealed at FAST higher agonist VL activation from the late up-beat (MTU stretching) to the early down-beat phases as well as increased muscle co-activation of VL and BF muscles from the late down-beat to early up-beat phases of dolphin-kicking. These results suggest that at increasing kicking speeds, the VL fascicles and tendinous tissues during aquatic movements can utilize tendon elasticity in a similar way than in terrestrial forms of locomotion. However, these activation profiles of VL and BF muscles may differ from their activation pattern in terrestrial locomotion.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.otherultrasonography
dc.subject.othervastus lateralis
dc.subject.otherelectromyography
dc.subject.othermuscle fascicle
dc.subject.otherswim
dc.titleMuscle-Tendon Interaction During Human Dolphin-Kick Swimming
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201910114401
dc.contributor.laitosLiikuntatieteellinen tiedekuntafi
dc.contributor.laitosFaculty of Sport and Health Sciencesen
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.ysoultraäänitutkimus
dc.subject.ysobiomekaniikka
dc.subject.ysolihakset
dc.subject.ysoelektromyografia
dc.subject.ysouinti
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p19405
jyx.subject.urihttp://www.yso.fi/onto/yso/p20292
jyx.subject.urihttp://www.yso.fi/onto/yso/p2784
jyx.subject.urihttp://www.yso.fi/onto/yso/p22356
jyx.subject.urihttp://www.yso.fi/onto/yso/p4330
dc.rights.urlhttps://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.3389/fphys.2019.01153
jyx.fundinginformationThis work was supported by Japan Society for Promotion of Science (KAKENHI) Grant Nos. 16K16547, 16K13010, 26702026, 17H02156, 15KK0261.


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