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dc.contributor.authorKoga, Daiki
dc.contributor.authorGonjo, Tomohiro
dc.contributor.authorKawai, Eisuke
dc.contributor.authorTsunokawa, Takaaki
dc.contributor.authorSakai, Shin
dc.contributor.authorSengoku, Yasuo
dc.contributor.authorHomma, Miwako
dc.contributor.authorTakagi, Hideki
dc.date.accessioned2021-09-01T12:38:32Z
dc.date.available2021-09-01T12:38:32Z
dc.date.created2020-10-05T15:43:32Z
dc.date.issued2020
dc.identifier.citationSports Biomechanics. 2020, under utgivelse.en_US
dc.identifier.issn1476-3141
dc.identifier.urihttps://hdl.handle.net/11250/2772274
dc.descriptionDette er siste tekst-versjon av artikkelen, og den kan inneholde små forskjeller fra forlagets pdf-versjon. Forlagets pdf-versjon finner du her: https://doi.org/10.1080/14763141.2020.1814852 / This is the final text version of the article, and it may contain minor differences from the journal's pdf version. The original publication is available here: https://doi.org/10.1080/14763141.2020.1814852en_US
dc.description.abstractThis study aimed to assess kinematic and kinetic changes in front crawl with various stroke frequency (SF) conditions to investigate why swimming velocity (SV) does not increase above a certain SF (SFmax). Eight male swimmers performed 20 m front crawl four times. The first trial involved maximal effort, whereas SF was controlled during the next three trials. The instructed SFs were 100 (T100%), 110 (T110%), and 120% (T120%) of the SFmax. Through pressure measurement and underwater motion analysis, hand propulsive force (calculated by the difference between the palm and dorsal pressure value and the hand area) and the angle of attack of the hand were quantified, and differences between trials were assessed by a repeated-measures ANOVA. There was no difference in SV between the conditions, while the angle of attack during the latter half of the underwater stroke at T120% was smaller by 25.7% compared with T100% (p = 0.007). The lower angle of attack induced a lower pressure value on the palm that consequently caused a smaller hand propulsive force at T120% than T100% (p = 0.026). Therefore, the decrease in the angle of attack must be minimised to maintain the hand propulsive force.en_US
dc.language.isoengen_US
dc.subjectswimming velocityen_US
dc.subjectfluid dynamicsen_US
dc.subjectmotion analysisen_US
dc.subjectmotoren_US
dc.subjectangle of attacken_US
dc.titleEffects of exceeding stroke frequency of maximal effort on hand kinematics and hand propulsive force in front crawlen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionacceptedVersionen_US
dc.source.pagenumber13en_US
dc.source.journalSports Biomechanicsen_US
dc.identifier.doi10.1080/14763141.2020.1814852
dc.identifier.cristin1837212
dc.description.localcodeInstitutt for fysisk prestasjonsevne / Department of Physical Performanceen_US
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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