Document Detail

An examination of shoulder kinematics and kinetics when using a commercial trunk harness while sheep shearing.
MedLine Citation:
PMID:  17572373     Owner:  NLM     Status:  MEDLINE    
Sheep shearing is a very physically demanding occupation, especially on the low back, such that many commercial harnesses have been developed to help reduce the load on the back. Such harnesses have been shown to significantly reduce peak and cumulative low back loads; however, the effect that these harnesses have on the shoulders, which are also highly involved during sheep shearing, has not been previously examined. The purpose of this study was to examine the shoulder postures and cumulative shoulder moments of 12 New Zealand sheep shearers. The use of the trunk harness reduced the percentage of time spent in shoulder flexion greater than 90 degrees and the time spent in shoulder abduction greater than 45 degrees as well as reduced the cumulative net joint flexor, abductor, and adductor shoulder moments by a minimum of 21%, 14%, and 42%, respectively. Therefore, the use of a commercial trunk harness to reduce low back injury may also help to reduce the risk of shoulder injury while sheep shearing.
Diane E Gregory; Stephan Milosavljevic; Poonam Pal; Jack P Callaghan
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-06-18
Journal Detail:
Title:  Applied ergonomics     Volume:  39     ISSN:  0003-6870     ISO Abbreviation:  Appl Ergon     Publication Date:  2008 Jan 
Date Detail:
Created Date:  2007-09-24     Completed Date:  2008-01-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0261412     Medline TA:  Appl Ergon     Country:  England    
Other Details:
Languages:  eng     Pagination:  29-35     Citation Subset:  IM    
Faculty of Applied Health Science, Department of Kinesiology, University of Waterloo, Waterloo, ONT, Canada.
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MeSH Terms
Middle Aged
New Zealand
Occupational Diseases / prevention & control
Protective Devices*
Sheep, Domestic*
Shoulder / physiology*

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