Muscle forces and their contributions to vertical and horizontal acceleration of the center of mass during sit-to-stand transfer in young, healthy adults
Deutscher übersetzter Titel: | Muskelkräfte und ihre Beiträge zur vertikalen und horizontalen Beschleunigung des Massenschwerpunkts beim Übergang vom Sitzen zum Stehen bei jungen, gesunden Erwachsenen |
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Autor: | Caruthers, Elena J.; Thompson, Julie A.; Chaudhari, Ajit M.W.; Schmitt, Laura C.; Best, Thomas M.; Saul, Katherine R.; Siston, Robert A. |
Erschienen in: | Journal of applied biomechanics |
Veröffentlicht: | 32 (2016), 5, S. 487-503, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Elektronische Ressource (online) Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 1065-8483, 1543-2688 |
DOI: | 10.1123/jab.2015-0291 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201612008541 |
Quelle: | BISp |
Abstract des Autors
Sit-to-stand transfer is a common task that is challenging for older adults and others with musculoskeletal impairments. Associated joint torques and muscle activations have been analyzed two-dimensionally, neglecting possible three-dimensional (3D) compensatory movements in those who struggle with sit-to-stand transfer. Furthermore, how muscles accelerate an individual up and off the chair remains unclear; such knowledge could inform rehabilitation strategies. We examined muscle forces, muscleinduced accelerations, and interlimb muscle force differences during sit-to-stand transfer in young, healthy adults. Dynamic simulations were created using a custom 3D musculoskeletal model; static optimization and induced acceleration analysis were used to determine muscle forces and their induced accelerations, respectively. The gluteus maximus generated the largest force (2009.07 ± 277.31 N) and was a main contributor to forward acceleration of the center of mass (COM) (0.62 ± 0.18 m/s2), while the quadriceps opposed it. The soleus was a main contributor to upward (2.56 ± 0.74 m/s2) and forward acceleration of the COM (0.62 ± 0.33 m/s2). Interlimb muscle force differences were observed, demonstrating lower limb symmetry cannot be assumed during this task, even in healthy adults. These findings establish a baseline from which deficits and compensatory strategies in relevant populations (eg, elderly, osteoarthritis) can be identified.