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http://dx.doi.org/10.18419/opus-13247
Autor(en): | Holzer, Denis Paternoster, Florian Kurt Hahn, Daniel Siebert, Tobias Seiberl, Wolfgang |
Titel: | Considerations on the human Achilles tendon moment arm for in vivo triceps surae muscle-tendon unit force estimates |
Erscheinungsdatum: | 2020 |
Dokumentart: | Zeitschriftenartikel |
Seiten: | 11 |
Erschienen in: | Scientific reports 10 (2020), No. 19559 |
URI: | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-132661 http://elib.uni-stuttgart.de/handle/11682/13266 http://dx.doi.org/10.18419/opus-13247 |
ISSN: | 2045-2322 |
Zusammenfassung: | Moment 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° ± 3.2° plantarflexion to 24.2° ± 5.1° 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 = 2), on the ascending limb and plateau region (n = 12), or on the ascending limb, plateau region and descending limb of the F-a-r (n = 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. |
Enthalten in den Sammlungen: | 10 Fakultät Wirtschafts- und Sozialwissenschaften |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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s41598-020-76625-x.pdf | 1,81 MB | Adobe PDF | Öffnen/Anzeigen |
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