Three-dimensional spinal motion and risk of low back injury during sheep shearing

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Title Three-dimensional spinal motion and risk of low back injury during sheep shearing
Author Milosavljevic, Stephan; Carman, Allan B.; Schneiders, Anthony G.; Milburn, Peter David; Wilson, Barry D.
Journal Name Applied Ergonomics
Year Published 2007
Place of publication United Kingdom
Publisher Elsevier
Abstract Sheep shearers are known to work in sustained flexed postures and have a high prevalence of low back pain (LBP). As sustained posture and spinal movement asymmetry under substantial loads are known risk factors for back injury our aim was to describe the 3D spinal movement of shearers while working. We hypothesised that thoraco-lumbar and lumbo-sacral movement would be tri-axial, asymmetric, and task specific. Sufficient retro-reflective markers were placed on the trunk of 12 shearers to define thoraco-lumbar and lumbo-sacral 3D motion during three tasks. Thoraco-lumbar movement consistently involved flexion, left lateral flexion, and right rotation. Lumbo-sacral movement consistently involved right lateral flexion in flexion with minimal rotation. Shearers therefore work in sustained spinal flexion where concurrent, asymmetric spinal movements into both lateral flexion and rotation occur. These asymmetric movements combined with repetitive loading may be risk factors leading to the high incidence of LBP in this occupational group.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1016/j.apergo.2006.04.026
Volume 38
Issue Number 3
Page from 299
Page to 306
ISSN 0003-6870
Date Accessioned 2009-03-17
Date Available 2009-11-10T05:58:31Z
Language en_AU
Research Centre Griffith Health Institute
Faculty Griffith Health Faculty
Subject PRE2009-Medical and Health Sciences
URI http://hdl.handle.net/10072/26561
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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