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dc.contributor.authorSeki, Keitaro
dc.contributor.authorKyröläinen, Heikki
dc.date.accessioned2024-09-10T08:59:37Z
dc.date.available2024-09-10T08:59:37Z
dc.date.issued2024
dc.identifier.citationSeki, K., & Kyröläinen, H. (2024). Effect of External Work Magnitude on Mechanical Efficiency of Sledge Jumping. <i>Journal of Applied Biomechanics</i>, <i>Early online</i>. <a href="https://doi.org/10.1123/jab.2023-0257" target="_blank">https://doi.org/10.1123/jab.2023-0257</a>
dc.identifier.otherCONVID_233449131
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/96981
dc.description.abstractThe mechanical efficiency of human locomotion has been studied extensively. The mechanical efficiency of the whole body occasionally exceeds muscle efficiency during bouncing type gaits. It is thought to occur due to elasticity and stiffness of the tendinomuscular system and neuromuscular functions, especially stretch reflexes. In addition, the lower limb joint kinetics affect mechanical efficiency. We investigated the impact of varying external work on mechanical efficiency and lower limb kinetics during repeated sledge jumping. Fifteen male runners performed sledge jumping for 4 minutes at 3 different sledge inclinations. Lower limb kinematics, ground reaction forces, and expired gases were analyzed. Mechanical efficiency did not differ according to sledge inclination. Mechanical efficiency correlated positively with the positive mechanical work of the knee and hip joints and the negative contribution of the hip joints. Conversely, it correlated negatively with both the positive and negative contributions of the ankle joint. This may be attributable to the greater workload in this study versus previous studies. To achieve greater external work, producing more mechanical energy at the proximal joint and transferring it to the distal joint could be an effective strategy for improving mechanical efficiency because of the greater force-generating capability of distal joint muscles.en
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherHuman Kinetics Publishers
dc.relation.ispartofseriesJournal of Applied Biomechanics
dc.rightsIn Copyright
dc.subject.otherenergy expenditure
dc.subject.otherjoint work
dc.subject.otherlower extremity
dc.subject.othersledge track inclination
dc.titleEffect of External Work Magnitude on Mechanical Efficiency of Sledge Jumping
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-202409105862
dc.contributor.laitosLiikuntatieteellinen tiedekuntafi
dc.contributor.laitosFaculty of Sport and Health Sciencesen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.description.reviewstatuspeerReviewed
dc.relation.issn1065-8483
dc.relation.volumeEarly online
dc.type.versionacceptedVersion
dc.rights.copyright© 2024 Human Kinetics, Inc.
dc.rights.accesslevelopenAccessfi
dc.subject.ysojalat
dc.subject.ysonivelet
dc.subject.ysoliikeoppi
dc.subject.ysobiomekaniikka
dc.subject.ysoenergiankulutus (aineenvaihdunta)
dc.subject.ysoteho (fysiikka)
dc.subject.ysohyppääminen
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p13757
jyx.subject.urihttp://www.yso.fi/onto/yso/p14975
jyx.subject.urihttp://www.yso.fi/onto/yso/p16028
jyx.subject.urihttp://www.yso.fi/onto/yso/p20292
jyx.subject.urihttp://www.yso.fi/onto/yso/p24540
jyx.subject.urihttp://www.yso.fi/onto/yso/p10712
jyx.subject.urihttp://www.yso.fi/onto/yso/p27825
dc.rights.urlhttp://rightsstatements.org/page/InC/1.0/?language=en
dc.relation.doi10.1123/jab.2023-0257
jyx.fundinginformationThis work was supported by the Japan Society for the Promotion of Science KAKENHI, grant numbers 19K20050 and 21K11425.
dc.type.okmA1


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