Bilateral Strength Deficit Is Not Neural in Origin; Rather Due to Dynamometer Mechanical Configuration
| Autor: | Sébastien Leteneur, Emilie Simoneau-Buessinger, Anis Toumi, Franck Barbier, François Gabrielli, Alexandra Dessurne, Jennifer M. Jakobi |
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| Přispěvatelé: | Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201 (LAMIH), Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Centre National de la Recherche Scientifique (CNRS)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), University of British Columbia - Okanagan (UBC) |
| Rok vydání: | 2015 |
| Předmět: |
Adult
Male medicine.medical_specialty Muscle Strength Dynamometer [SDV]Life Sciences [q-bio] Science Electromyography Isometric exercise 03 medical and health sciences Young Adult 0302 clinical medicine Physical medicine and rehabilitation Isometric Contraction medicine Torque Functional electrical stimulation Humans Muscle Skeletal Multidisciplinary medicine.diagnostic_test Dynamometer business.industry 030229 sport sciences Healthy Volunteers medicine.anatomical_structure Physical therapy Medicine medicine.symptom Ankle business 030217 neurology & neurosurgery Ankle Joint Muscle contraction Research Article |
| Zdroj: | PLoS ONE PLoS ONE, Vol 10, Iss 12, p e0145077 (2015) PLoS ONE, Public Library of Science, 2015, 10 (12), pp.e0145077. ⟨10.1371/journal.pone.0145077⟩ |
| ISSN: | 1932-6203 |
| DOI: | 10.1371/journal.pone.0145077⟩ |
| Popis: | IF=3.23; International audience; During maximal contractions, the sum of forces exerted by homonymous muscles unilaterally is typically higher than the sum of forces exerted by the same muscles bilaterally. However, the underlying mechanism(s) of this phenomenon, which is known as the bilateral strength deficit, remain equivocal. One potential factor that has received minimal attention is the contribution of body adjustments to bilateral and unilateral force production. The purpose of this study was to evaluate the plantar-flexors in an innovative dynamometer that permitted the influence of torque from body adjustments to be adapted. Participants were identically positioned between two setup configurations where torques generated from body adjustments were included within the net ankle torque (locked-unit) or independent of the ankle (open-unit). Twenty healthy adult males performed unilateral and bilateral maximal voluntary isometric plantar-flexion contractions using the dynamometer in the open and locked-unit mechanical configurations. While there was a significant bilateral strength deficit in the locked-unit (p = 0.01), it was not evident in the open-unit (p = 0.07). In the locked-unit, unilateral torque was greater than in the open-unit (p0.05). This study revealed that the mechanical configuration of the dynamometer and then the body adjustments caused the observation of a bilateral strength deficit |
| Databáze: | OpenAIRE |
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