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Hip end of range data

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  • Hip end of range data

    Dear Readers,

    We are conducting a study of individuals covering the period of their lives
    when they go through the transition from working to retirement. One
    variable we are looking at is joint range of motion in the lower extremity,
    and specifically the end of range data at these joints.

    We are using electrogoniometers (Biometrics) to measure the end points. We
    think we have a reproducible method for obtaining accurate end of range data
    at the ankle and knee but the hip is proving to be a problem. We feel that
    this is largely due to the fact that the movement of soft tissue around the
    pelvis does not correlate all that well with the movement of the underlying
    bones. This is compounded by the fact that some older volunteers can be
    uncomfortable with disrobing in order for us to get the best measurements
    possible. A lot of the literature on range of motion only reports data, but
    not how this problem was dealt with (if at all).

    I suppose this is not a problem unique to electrogoniometry - virtually all
    motion analysis systems utilise skin-mounted markers, which in some
    instances move quite differently from the underlying bony structures.

    We are wondering if anyone has any suggestions for us. As usual, we will
    publish a précis of responses received. Thank you for your attention.


    Drew Smith, PhD

    Senior Research Fellow
    Human Movement Laboratory
    School of Health Professions
    University of Brighton
    49 Darley Road
    Eastbourne BN20 7UR
    United Kingdom

    Telephone: (01273) 643 457 Int'l: +44 1273 643457
    Laboratory: (01273) 643 767 Int'l: +44 1273 643767
    Fax: (01273) 643 944 Int'l: +44 1273 643944

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