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dc.contributor.authorWalker, Simon
dc.contributor.authorTrezise, Joanne
dc.contributor.authorHaff, Guy Gregory
dc.contributor.authorNewton, Robert U.
dc.contributor.authorHäkkinen, Keijo
dc.contributor.authorBlazevich, Anthony J.
dc.date.accessioned2020-08-17T14:38:26Z
dc.date.available2020-08-17T14:38:26Z
dc.date.issued2020
dc.identifier.citationWalker, S., Trezise, J., Haff, G. G., Newton, R. U., Häkkinen, K., & Blazevich, A. J. (2020). Increased fascicle length but not patellar tendon stiffness after accentuated eccentric-load strength training in already-trained men. <i>European Journal of Applied Physiology</i>, <i>120</i>(11), 2371-2382. <a href="https://doi.org/10.1007/s00421-020-04462-x" target="_blank">https://doi.org/10.1007/s00421-020-04462-x</a>
dc.identifier.otherCONVID_41712303
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/71426
dc.description.abstractPurpose This study examined whether additional external load during the eccentric phase of lower limb strength training exercises led to greater adaptations in knee extensor strength, muscle architecture, and patellar tendon properties than traditional concentric–eccentric training in already-trained men. Methods Twenty-eight men accustomed to strength training were randomized to undertake 10 weeks of supervised traditional (TRAD) or accentuated eccentric loading (AEL) or continue their habitual unsupervised (CON) strength training. TRAD and AEL trained 2∙week−1 with a six-repetition maximum (RM) session and a ten-RM session. TRAD used the same external load in both concentric and eccentric phases, while AEL used 40% greater load during the eccentric than concentric phase. Tests were performed at pre- and post-training, including: maximum unilateral isokinetic (30°·s−1) concentric, eccentric and isometric torques by isokinetic dynamometry, unilateral isometric ramp contractions with muscle–tendon ultrasound imaging to measure tendon stiffness and hysteresis, and resting vastus lateralis and medialis fascicle angle and length measured by extended-field-of-view ultrasound. Results After training, both TRAD and AEL significantly increased maximum concentric and isometric torque (p < 0.05), but only AEL increased eccentric torque (AEL: + 10 ± 9%, TRAD: + 4 ± 9%) and vastus lateralis (AEL: + 14 ± 14%, TRAD: + 1 ± 10%) and medialis (AEL: + 19 ± 8%, TRAD: + 5 ± 11%) fascicle length. Conclusion Both TRAD and AEL increased maximum knee extensor strength but only AEL increased VL and VM fascicle length. Neither training program promoted changes in fascicle angle or changes in patellar tendon properties in our already-trained men.en
dc.format.mimetypeapplication/pdf
dc.languageeng
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofseriesEuropean Journal of Applied Physiology
dc.rightsCC BY 4.0
dc.subject.othereccentric overload
dc.subject.otherresistance training
dc.subject.othermuscle architecture
dc.subject.otheradaptation
dc.subject.othermechanical properties
dc.titleIncreased fascicle length but not patellar tendon stiffness after accentuated eccentric-load strength training in already-trained men
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-202008175561
dc.contributor.laitosLiikuntatieteellinen tiedekuntafi
dc.contributor.laitosFaculty of Sport and Health Sciencesen
dc.contributor.oppiaineValmennus- ja testausoppifi
dc.contributor.oppiaineScience of Sport Coaching and Fitness Testingen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.description.reviewstatuspeerReviewed
dc.format.pagerange2371-2382
dc.relation.issn1439-6319
dc.relation.numberinseries11
dc.relation.volume120
dc.type.versionpublishedVersion
dc.rights.copyright© 2020 the Authors
dc.rights.accesslevelopenAccessfi
dc.subject.ysoharjoittelu
dc.subject.ysomekaniikka
dc.subject.ysolihakset
dc.subject.ysofyysinen kuormittavuus
dc.subject.ysovoimaharjoittelu
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p26412
jyx.subject.urihttp://www.yso.fi/onto/yso/p3753
jyx.subject.urihttp://www.yso.fi/onto/yso/p2784
jyx.subject.urihttp://www.yso.fi/onto/yso/p136
jyx.subject.urihttp://www.yso.fi/onto/yso/p16233
dc.rights.urlhttps://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.1007/s00421-020-04462-x
jyx.fundinginformationThis work was funded internally by the CESSR, Edith Cowan University during data collection and by the Faculty of Sport and Health Sciences, University of Jyväskylä.


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