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Multidirectional measures of seated postural stability.

Heather M Kerr1, Janice J Eng

  • 1Riverfront Physiotherapy, Whitehorse, Yukon, Canada Y1A 2A8.

Clinical Biomechanics (Bristol, Avon)
|September 11, 2002
PubMed
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Measuring centre of pressure during seated reaching and leaning tasks offers reliable data for assessing sitting balance. This method is sensitive to movement direction and foot support, aiding rehabilitation efforts.

Area of Science:

  • Biomechanics
  • Rehabilitation Science
  • Gerontology

Background:

  • Seated reaching and leaning tasks are crucial in rehabilitation for assessing and improving sitting balance and motor function.
  • Previous assessments often used ordinal scales, lacking continuous, multidirectional measures of seated postural stability.

Purpose of the Study:

  • To quantify the limits of stability during a seated leaning/reaching task.
  • To determine the test-retest reliability of these measurements.
  • To investigate the influence of movement direction and foot support on stability.

Main Methods:

  • A test-retest reliability design was employed with twelve older adults.
  • Participants performed a seated reaching/leaning task over two separate days.

Related Experiment Videos

  • Net body centre of pressure displacement and velocity were measured using three forceplates under varying conditions of movement direction and foot support.

    • Main Results:

    • Most centre of pressure measures demonstrated moderate to very high test-retest reliability.
    • Reliability was slightly reduced for backward movements with foot support.
    • Stability measurements were significantly influenced by both foot support and the direction of movement.

    Conclusions:

    • Centre of pressure measurements provide reliable and sensitive data for assessing seated postural stability.
    • These measures hold potential utility for clinical evaluations in rehabilitation settings.
    • The findings highlight the importance of considering movement direction and foot support in balance assessments.