Document Detail

Acute biomechanical responses to a prolonged standing exposure in a simulated occupational setting.
MedLine Citation:
PMID:  20737337     Owner:  NLM     Status:  MEDLINE    
Prolonged occupational standing has previously been associated with low back pain (LBP) development. The immediate effects of a bout of prolonged standing on subsequent functional movement performance have not been investigated. It is possible that including a period of prolonged standing may have acute, detrimental effects. The purpose of the study is to investigate the impact of a prolonged standing exposure on biomechanical profiles (trunk muscle activation, joint stiffness and kinematics) during three functional movements. A total of 23 volunteers without history of LBP performed lumbar flexion, single-leg stance and unloaded squat movements pre- and post 2 h of standing exposure. It was found that 40% of the participants developed LBP during the standing exposure. There was a decrease in vertebral joint rotation stiffness in lateral bending and increased centre of pressure excursion during unilateral stance following standing exposure. There may be adverse effects to prolonged standing if followed by activities requiring precise balance or resistance of side loads. STATEMENT OF RELEVANCE: Prolonged standing may result in decreases in balance reactions during narrow base conditions as well as in the capacity to effectively resist side-loads at the trunk. Consideration should be given when prolonged standing is included in the workplace.
Erika Nelson-Wong; Samuel J Howarth; Jack P Callaghan
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Ergonomics     Volume:  53     ISSN:  1366-5847     ISO Abbreviation:  Ergonomics     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-08-25     Completed Date:  2010-12-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0373220     Medline TA:  Ergonomics     Country:  England    
Other Details:
Languages:  eng     Pagination:  1117-28     Citation Subset:  IM; S    
Regis University, Denver, Colorado, USA.
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MeSH Terms
Biomechanics / physiology
Electromyography / instrumentation,  methods
Low Back Pain / etiology*
Occupational Diseases / etiology*
Postural Balance / physiology
Posture / physiology*
Time Factors
Young Adult

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

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