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    The effect of a backrest and seatpan inclination on sitting discomfort and trunk muscle activation in subjects with extension-related low back pain

    Access Status
    Fulltext not available
    Authors
    Curran, M.
    Dankaerts, W.
    O'Sullivan, Peter
    O'Sullivan, L.
    O'Sullivan, Keiran
    Date
    2014
    Type
    Journal Article
    
    Metadata
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    Citation
    Curran, M. and Dankaerts, W. and O'Sullivan, P. and O'Sullivan, L. and O'Sullivan, K. 2014. The effect of a backrest and seatpan inclination on sitting discomfort and trunk muscle activation in subjects with extension-related low back pain. Ergonomics. 57 (5): pp. 733-743.
    Source Title
    Ergonomics
    DOI
    10.1080/00140139.2014.897378
    ISSN
    00140139
    School
    School of Physiotherapy
    URI
    http://hdl.handle.net/20.500.11937/5614
    Collection
    • Curtin Research Publications
    Abstract

    Few studies have demonstrated that seating modifications reduce low back pain (LBP). One recent study found that a forward-inclined seatpan reduced low back discomfort (LBD), however this was only examined in people with flexion-related LBP. No study has yet investigated its effectiveness among people with extension-related LBP. This crossover study examined 12 subjects with extension-related LBP. Sitting discomfort and surface electromyography of three trunk muscles were recorded during a 10-minute typing task while sitting with two different seatpan inclinations, both with and without a backrest. LBD (p < 0.001) and overall body discomfort (OBD) ( p = 0.016) were significantly greater on the forward-inclined seatpan. The backrest did not alter trunk muscle activation or sitting discomfort. The results demonstrate that in a specific subgroup of people with extension-related LBP, increasing forward seatpan inclination significantly increased LBD and OBD. Future research should consider matching ergonomics prescriptions according to the individual presentation of people with LBP. Practitioner Summary: Sitting on a forward-inclined seatpan resulted in greater low back discomfort and overall body discomfort than sitting on a flat seatpan during a typing task among people with extension-related low back pain (LBP). Future research should examine matching ergonomics prescriptions to the individual presentation of people with LBP.

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