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2021-03-12Zeitschriftenartikel DOI: 10.18452/23505
Quantifying mechanical loading and elastic strain energy of the human Achilles tendon during walking and running
dc.contributor.authorKharazi, Mohamadreza
dc.contributor.authorBohm, Sebastian
dc.contributor.authorTheodorakis, Christos
dc.contributor.authorMersmann, Falk
dc.contributor.authorArampatzis, Adamantios
dc.date.accessioned2021-10-11T14:15:04Z
dc.date.available2021-10-11T14:15:04Z
dc.date.issued2021-03-12none
dc.identifier.other10.1038/s41598-021-84847-w
dc.identifier.urihttp://edoc.hu-berlin.de/18452/24145
dc.description.abstractThe purpose of the current study was to assess in vivo Achilles tendon (AT) mechanical loading and strain energy during locomotion. We measured AT length considering its curve-path shape. Eleven participants walked at 1.4 m/s and ran at 2.5 m/s and 3.5 m/s on a treadmill. The AT length was defined as the distance between its origin at the gastrocnemius medialis myotendinous junction (MTJ) and the calcaneal insertion. The MTJ was tracked using ultrasonography and projected to the reconstructed skin surface to account for its misalignment. Skin-to-bone displacements were assessed during a passive rotation (5°/s) of the ankle joint. Force and strain energy of the AT during locomotion were calculated by fitting a quadratic function to the experimentally measured tendon force–length curve obtained from maximum voluntary isometric contractions. The maximum AT strain and force were affected by speed (p < 0.05, ranging from 4.0 to 4.9% strain and 1.989 to 2.556 kN), yet insufficient in magnitude to be considered as an effective stimulus for tendon adaptation. Besides the important tendon energy recoil during the propulsion phase (7.8 to 11.3 J), we found a recoil of elastic strain energy at the beginning of the stance phase of running (70–77 ms after touch down) between 1.7 ± 0.6 and 1.9 ± 1.1 J, which might be functionally relevant for running efficiency.eng
dc.language.isoengnone
dc.publisherHumboldt-Universität zu Berlin
dc.rights(CC BY 4.0) Attribution 4.0 Internationalger
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject.ddc152 Sinneswahrnehmung, Bewegung, Emotionen, physiologische Triebenone
dc.titleQuantifying mechanical loading and elastic strain energy of the human Achilles tendon during walking and runningnone
dc.typearticle
dc.identifier.urnurn:nbn:de:kobv:11-110-18452/24145-0
dc.identifier.doihttp://dx.doi.org/10.18452/23505
dc.type.versionpublishedVersionnone
local.edoc.container-titleScientific reportsnone
local.edoc.pages13none
local.edoc.anmerkungThis article was supported by the German Research Foundation (DFG) and the Open Access Publication Fund of Humboldt-Universität zu Berlin.none
local.edoc.type-nameZeitschriftenartikel
local.edoc.institutionKultur-, Sozial- und Bildungswissenschaftliche Fakultätnone
local.edoc.container-typeperiodical
local.edoc.container-type-nameZeitschrift
local.edoc.container-publisher-nameMacmillan Publishers Limited, part of Springer Naturenone
local.edoc.container-publisher-placeLondonnone
local.edoc.container-volume11none
dc.description.versionPeer Reviewednone
local.edoc.container-articlenumber5830none
dc.identifier.eissn2045-2322

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