| Effects of exercise during head-down bed rest on postural control. | |
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MedLine Citation:
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PMID: 9143748 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: The effects of exercise on postural control during walking were evaluated following exposure to head-down bed rest (BR). METHODS: Two groups of male subjects (N = 18, mean age = 21.4 yr +/- SE 1.0) were exposed to 5 d of 6 degrees head-down bed rest. The experimental group (E) exercised 90 min.d-1 (n = 12 subjects) during the BR while the control group received no intervention (n = 6). The exercise treatment consisted of a combination of isotonic and isokinetic lower extremity exercise training. Electromyographic (EMG) activity in the tibialis anterior, gastrocnemius, vastus lateralis, and biceps femoris was measured during walking before and after BR. RESULTS: Following BR, EMG activity increased in both test subject groups for all muscles (p < 0.05). However, there were no significant differences in EMG activity between the C and E groups either before or after BR. CONCLUSIONS: These data suggest that the ability of the postural control system to adjust to the gravitational environment was compromised as a result of BR. In addition, we conclude that the exercise protocol used was not an effective countermeasure to the alterations in the postural control system. |
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Authors:
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J E Davis; K E Horwood; G K DeJong |
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Publication Detail:
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Type: Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Aviation, space, and environmental medicine Volume: 68 ISSN: 0095-6562 ISO Abbreviation: Aviat Space Environ Med Publication Date: 1997 May |
Date Detail:
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Created Date: 1997-08-05 Completed Date: 1997-08-05 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7501714 Medline TA: Aviat Space Environ Med Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 392-5 Citation Subset: IM; S |
Affiliation:
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Department of Exercise and Health Science, Alma College, MI 48801, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Analysis of Variance Bed Rest* / adverse effects Electromyography Exercise / physiology* Head-Down Tilt* / adverse effects Humans Hypogravity / adverse effects Leg / physiopathology* Male Muscle Contraction / physiology* Muscle, Skeletal / physiopathology* Posture / physiology Reflex, Abnormal / physiology* Space Simulation / adverse effects |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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