| Low-volume resistance exercise attenuates the decline in strength and muscle mass associated with immobilization. | |
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MedLine Citation:
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PMID: 20658567 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We determined the effectiveness of low-volume resistance exercise (EX) for the attenuation of loss of muscle mass and strength during leg immobilization. Men (N = 5) and women (N = 12, age 24 ± 5 years, body mass index 25.4 ± 3.6 kg/m(2)) were divided into two groups: exercise (EX; n = 12) and control (CON; n = 5). Subjects wore a knee brace on one leg that prevented weight bearing for 14 days. Resistance exercise (EX; 80% of maximal) was performed by the immobilized limb every other day. Immobilization induced a significant reduction (P < 0.05) in muscle fiber and thigh cross-sectional area (CSA), isometric knee extensor, and plantarflexor strength in the CON (P < 0.01) but not in the EX group. There were significant losses in triceps surae CSA in the CON and EX groups (P < 0.05), but the losses were greater in CON subjects (P < 0.01). A minimal volume (140 contractions in 14 days) of resistive exercise is an effective countermeasure against immobilization-induced atrophy of the quadriceps femoris but is only partially effective for the triceps surae. |
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Authors:
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Bryan R Oates; Elisa I Glover; Daniel W West; Jessica L Fry; Mark A Tarnopolsky; Stuart M Phillips |
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Publication Detail:
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Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Muscle & nerve Volume: 42 ISSN: 1097-4598 ISO Abbreviation: Muscle Nerve Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-09-29 Completed Date: 2010-10-28 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: 539-46 Citation Subset: IM |
Affiliation:
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Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4K1, Canada. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Anatomy, Cross-Sectional Atrophy Diet Electromyography Female Humans Immobilization / adverse effects* Leg Magnetic Resonance Imaging Male Motor Neurons Muscle Strength* Muscle, Skeletal / pathology*, physiopathology* Thigh Time Factors Torque Weight Lifting* |
| Grant Support | |
ID/Acronym/Agency:
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//Canadian Institutes of Health Research |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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