https://puma.ub.uni-stuttgart.de/group/simtech/estimation%20maximumPUMA RSS feed for /group/simtech/estimation%20maximum2026-04-22T09:54:04+02:00https://puma.ub.uni-stuttgart.de/bibtex/2dda7c7842f8b627c739b615bde678e28/inspo5inspo52022-07-19T11:10:29+02:00joint maximum range estimation the corresponding muscle of Far angle working force TS on <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Denis Holzer" itemprop="url" href="/person/112a4bf98a06f2d283088a3622f5e5b0d/author/0"><span itemprop="name">D. Holzer</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Florian Kurt Paternoster" itemprop="url" href="/person/112a4bf98a06f2d283088a3622f5e5b0d/author/1"><span itemprop="name">F. Paternoster</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Daniel Hahn" itemprop="url" href="/person/112a4bf98a06f2d283088a3622f5e5b0d/author/2"><span itemprop="name">D. Hahn</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Tobias Siebert" itemprop="url" href="/person/112a4bf98a06f2d283088a3622f5e5b0d/author/3"><span itemprop="name">T. Siebert</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang Seiberl" itemprop="url" href="/person/112a4bf98a06f2d283088a3622f5e5b0d/author/4"><span itemprop="name">W. Seiberl</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Scientific Reports</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">10 </span></span>(<span itemprop="issueNumber">1</span>): <span itemprop="pagination">19559</span></em> </span>(<em><span>Nov 11, 2020<meta content="Nov 11, 2020" itemprop="datePublished"/></span></em>)</span>Tue Jul 19 11:10:29 CEST 2022Scientific Reports11119559Considerations on the human Achilles tendon moment arm for in vivo triceps surae muscle--tendon unit force estimates102020joint maximum range estimation the corresponding muscle of Far angle working force TS on 11Moment arm-angle functions (MA-a-functions) are commonly used to estimate in vivo muscle forces in humans. However, different MA-a-functions might not only influence the magnitude of the estimated muscle forces but also change the shape of the muscle's estimated force-angle relationship (F-a-r). Therefore, we investigated the influence of different literature based Achilles tendon MA-a-functions on the triceps surae muscle--tendon unit F-a-r. The individual in vivo triceps torque--angle relationship was determined in 14 participants performing maximum voluntary fixed-end plantarflexion contractions from 18.3{\textdegree}{\thinspace}{\textpm}{\thinspace}3.2{\textdegree} plantarflexion to 24.2{\textdegree}{\thinspace}{\textpm}{\thinspace}5.1{\textdegree} dorsiflexion on a dynamometer. The resulting F-a-r were calculated using 15 literature-based in vivo Achilles tendon MA-a-functions. MA-a-functions affected the F-a-r shape and magnitude of estimated peak active triceps muscle--tendon unit force. Depending on the MA-a-function used, the triceps was solely operating on the ascending limb (n{\thinspace}={\thinspace}2), on the ascending limb and plateau region (n{\thinspace}={\thinspace}12), or on the ascending limb, plateau region and descending limb of the F-a-r (n{\thinspace}={\thinspace}1). According to our findings, the estimated triceps muscle--tendon unit forces and the shape of the F-a-r are highly dependent on the MA-a-function used. As these functions are affected by many variables, we recommend using individual Achilles tendon MA-a-functions, ideally accounting for contraction intensity-related changes in moment arm magnitude.