Document Detail

Countermeasures against lumbar spine deconditioning in prolonged bed rest: resistive exercise with and without whole body vibration.
MedLine Citation:
PMID:  20864564     Owner:  NLM     Status:  MEDLINE    
To evaluate the effect of short-duration, high-load resistive exercise, with and without whole body vibration on lumbar muscle size, intervertebral disk and spinal morphology changes, and low back pain (LBP) incidence during prolonged bed rest, 24 subjects underwent 60 days of head-down tilt bed rest and performed either resistive vibration exercise (n = 7), resistive exercise only (n = 8), or no exercise (n = 9; 2nd Berlin Bed-Rest Study). Discal and spinal shape was measured from sagittal plane magnetic resonance images. Cross-sectional areas (CSAs) of the multifidus, erector spinae, quadratus lumborum, and psoas were measured on para-axial magnetic resonance images. LBP incidence was assessed with questionnaires at regular intervals. The countermeasures reduced CSA loss in the multifidus, lumbar erector spinae and quadratus lumborum muscles, with greater increases in psoas muscle CSA seen in the countermeasure groups (P ≤ 0.004). There was little statistical evidence for an additional effect of whole body vibration above resistive exercise alone on these muscle changes. Exercise subjects reported LBP more frequently in the first week of bed rest, but this was only significant in resistive exercise only (P = 0.011 vs. control, resistive vibration exercise vs. control: P = 0.56). No effect of the countermeasures on changes in spinal morphology was seen (P ≥ 0.22). The results suggest that high-load resistive exercise, with or without whole body vibration, performed 3 days/wk can reduce lumbar muscle atrophy, but further countermeasure optimization is required.
Daniel L Belavý; Gabriele Armbrecht; Ulf Gast; Carolyn A Richardson; Julie A Hides; Dieter Felsenberg
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Publication Detail:
Type:  Comparative Study; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't     Date:  2010-09-23
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  109     ISSN:  1522-1601     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-12-14     Completed Date:  2011-03-25     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1801-11     Citation Subset:  IM    
Centre for Muscle and Bone Research, Charité Universitätsmedizin Berlin, Berlin, Germany.
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MeSH Terms
Analysis of Variance
Bed Rest / adverse effects*
Chi-Square Distribution
Head-Down Tilt
Intervertebral Disc / pathology,  physiopathology
Linear Models
Low Back Pain / etiology,  pathology,  physiopathology,  prevention & control*
Lumbar Vertebrae
Magnetic Resonance Imaging
Muscle, Skeletal / pathology,  physiopathology*
Muscular Atrophy / etiology,  pathology,  physiopathology,  therapy*
Pain Measurement
Resistance Training*
Space Flight
Spine / pathology,  physiopathology*
Time Factors
Treatment Outcome
Vibration / therapeutic use*
Weightlessness Countermeasures*
Weightlessness Simulation / adverse effects*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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