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    Is what you see what you get? Standard inclinometry of set upper arm elevation angles

    Access Status
    Fulltext not available
    Authors
    Jackson, J.
    Mathiassen, Svend
    Wahlström, J.
    Liv, P.
    Forsman, M.
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Jackson, J. and Mathiassen, S. and Wahlström, J. and Liv, P. and Forsman, M. 2015. Is what you see what you get? Standard inclinometry of set upper arm elevation angles. Applied Ergonomics. 47: pp. 242-252.
    Source Title
    Applied Ergonomics
    DOI
    10.1016/j.apergo.2014.08.014
    ISSN
    0003-6870
    School
    School of Physiotherapy and Exercise Science
    URI
    http://hdl.handle.net/20.500.11937/68620
    Collection
    • Curtin Research Publications
    Abstract

    © 2014 Elsevier Ltd and The Ergonomics Society. Previous research suggests inclinometers (INC) underestimate upper arm elevation. This study was designed to quantify possible bias in occupationally relevant postures, and test whether INC performance could be improved using calibration. Participants were meticulously positioned in set arm flexion and abduction angles between 0° and 150°. Different subject-specific and group-level regression models comprising linear and quadratic components describing the relationship between set and INC-registered elevation were developed using subsets of data, and validated using additional data. INC measured arm elevation showed a downward bias, particularly above 60°. INC data adjusted using the regression models were superior to unadjusted data; a subject-specific, two-point calibration based on measurements at 0° and 90° gave results closest to the 'true' set angles. Thus, inclinometer measured arm elevation data required calibration to arrive at 'true' elevation angles. Calibration to a common measurement scale should be considered when comparing arm elevation data collected using different methods.

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