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Muscle fiber conduction and fatigue during dynamic actions on a flywheel exercise device
Karolinska Institutet.ORCID iD: 0000-0003-3470-5175
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2005 (English)In: Journal of Gravitational Physiology, ISSN 1077-9248, Vol. 12, no 1, 113-114 p.Article in journal (Refereed) Published
Abstract [en]

Exposure to microgravity has adverse effects on skeletal muscle size and function. Such effects can be counteracted by training using a Flywheel Exercise Device (FWED). Multichannel EMG signals were detected in nine males from vastus medialis and laterialis muscles during 30 coupled concentric (CON) and eccentric (ECC) actions on the FWED. Muscle fiber conduction velocity (CV) was assessed for each action. CV initial values depended on muscle action type (CON/ECC) and were higher in CON than ECC actions. CV decreased (P<0.05) over time during the task. Its slope was greater for VL than VM but was not different between CON and ECC. It was concluded that direct measure of CV is feasible during dynamic exercise, and that this technique may be used for objective assessment of the effect of resistance training in counteracting microgravity-induced muscle atrophy.

Place, publisher, year, edition, pages
2005. Vol. 12, no 1, 113-114 p.
National Category
Physiology
Identifiers
URN: urn:nbn:se:kth:diva-48296OAI: oai:DiVA.org:kth-48296DiVA: diva2:457257
Note

QC 20111117

Available from: 2011-11-17 Created: 2011-11-17 Last updated: 2016-12-13Bibliographically approved

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Norrbrand, Lena
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