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2024-03-14Zeitschriftenartikel DOI: 10.18452/28568
Assessment and modelling of the activation‐dependent shift in optimal length of the human soleus muscle in vivo
dc.contributor.authorBohm, Sebastian
dc.contributor.authorSchroll, Arno
dc.contributor.authorMersmann, Falk
dc.contributor.authorArampatzis, Adamantios
dc.date.accessioned2024-04-23T16:37:33Z
dc.date.available2024-04-23T16:37:33Z
dc.date.issued2024-03-14none
dc.date.updated2024-04-16T08:21:58Z
dc.identifier.issn0022-3751
dc.identifier.urihttp://edoc.hu-berlin.de/18452/29202
dc.description.abstractPrevious in vitro and in situ studies have reported a shift in optimal muscle fibre length for force generation (L0) towards longer length at decreasing activation levels (also referred to as length‐dependent activation), yet the relevance for in vivo human muscle contractions with a variable activation pattern remains largely unclear. By a combination of dynamometry, ultrasound and electromyography (EMG), we experimentally obtained muscle force–fascicle length curves of the human soleus at 100%, 60% and 30% EMGmax levels from 15 participants aiming to investigate activation‐dependent shifts in L0 in vivo. The results showed a significant increase in L0 of 6.5 ± 6.0% from 100% to 60% EMGmax and of 9.1 ± 7.2% from 100% to 30% EMGmax (both P < 0.001), respectively, providing evidence of a moderate in vivo activation dependence of the soleus force–length relationship. Based on the experimental results, an approximation model of an activation‐dependent force–length relationship was defined for each individual separately and for the collective data of all participants, both with sufficiently high accuracy (R2 of 0.899 ± 0.056 and R2 = 0.858). This individual approximation approach and the general approximation model outcome are freely accessible and may be used to integrate activation‐dependent shifts in L0 in experimental and musculoskeletal modelling studies to improve muscle force predictions.eng
dc.description.sponsorshipDeutsche Forschungsgemeinschaft DFG, German Research Foundation
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.subjectactivationeng
dc.subjectactivation‐dependent shift in optimum lengtheng
dc.subjectforce–length relationshipeng
dc.subjectin vivoeng
dc.subjectmuscle modellingeng
dc.subjectsoleus muscleeng
dc.subject.ddc610 Medizin und Gesundheitnone
dc.titleAssessment and modelling of the activation‐dependent shift in optimal length of the human soleus muscle in vivonone
dc.typearticle
dc.identifier.urnurn:nbn:de:kobv:11-110-18452/29202-7
dc.identifier.doihttp://dx.doi.org/10.18452/28568
dc.type.versionpublishedVersionnone
local.edoc.pages14none
local.edoc.type-nameZeitschriftenartikel
local.edoc.container-typeperiodical
local.edoc.container-type-nameZeitschrift
dc.description.versionPeer Reviewednone
dc.identifier.eissn1469-7793
dcterms.bibliographicCitation.doi10.1113/JP285986
dcterms.bibliographicCitation.journaltitleThe journal of physiologynone
dcterms.bibliographicCitation.volume602none
dcterms.bibliographicCitation.issue7none
dcterms.bibliographicCitation.originalpublishernameWiley-Blackwellnone
dcterms.bibliographicCitation.originalpublisherplaceHoboken, NJnone
dcterms.bibliographicCitation.pagestart1371none
dcterms.bibliographicCitation.pageend1384none
bua.departmentKultur-, Sozial- und Bildungswissenschaftliche Fakultätnone

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