| Knee extensor fatigability after bedrest for 8 weeks with and without countermeasure. | |
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MedLine Citation:
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PMID: 17661376 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We analyzed the effects of gravitational unloading on muscular fatigability and the effectiveness of resistive vibration exercise to counteract these changes. Changes in knee extensor fatigability as a consequence of 8 weeks of horizontal bedrest with or without daily resistive vibration exercise were evaluated in 17 healthy male volunteers. Bedrest increased fatigability (% decrease in maximal voluntary isometric torque per minute exercise) from -7.2 +/- 0.5 to -10.2 +/- 1.0%/min (P < 0.05), which was accompanied by a decline (of 52.0 +/- 3.7%, P < 0.05) in muscle blood flow. Daily resistive vibration exercise training during bedrest prevented increases in fatigability (from -10.8 +/- 1.8 to -8.4 +/- 1.6%/min, P < 0.05), and mitigated the reduction in blood flow (decline of 26.1 +/- 5.1%, P < 0.05). Daily resistive exercise may thus be suggested as an effective countermeasure during spaceflight and illness-related prolonged bedrest to combat the detrimental changes in muscle endurance that result from gravitational unloading. |
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Authors:
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Edwin R Mulder; Wolfgang M Kuebler; Karin H L Gerrits; Joern Rittweger; Dieter Felsenberg; Dick F Stegeman; Arnold de Haan |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Muscle & nerve Volume: 36 ISSN: 0148-639X ISO Abbreviation: Muscle Nerve Publication Date: 2007 Dec |
Date Detail:
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Created Date: 2007-11-26 Completed Date: 2008-02-08 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7803146 Medline TA: Muscle Nerve Country: United States |
Other Details:
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Languages: eng Pagination: 798-806 Citation Subset: IM |
Affiliation:
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Radboud University Nijmegen Medical Center, Department of Clinical Neurophysiology, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands. e.mulder@neuro.umcn.nl |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Bed Rest / adverse effects* Blood Flow Velocity Electromyography Exercise Therapy / methods* Exercise Tolerance Humans Knee / physiopathology Male Muscle Contraction Muscle Fatigue* Muscle Weakness / etiology, physiopathology*, prevention & control Muscular Disorders, Atrophic / etiology, physiopathology*, prevention & control Physical Fitness Quadriceps Muscle / blood supply, physiopathology* Spectroscopy, Near-Infrared Time Factors Treatment Outcome Vibration / therapeutic use |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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