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A Vibrotactile Feedback Device for Seated Balance Assessment and Training
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Effects of simulated occupational task parameters on balance.

Angela DiDomenico1, Krystyna Gielo-Perczak, Raymond W McGorry

  • 1Liberty Mutual Research Institute for Safety, 71 Frankland Road, Hopkinton, MA 01748, USA. angela.didomenico@libertymutual.com

Applied Ergonomics
|November 21, 2009
PubMed
Summary

Surface conditions significantly impact balance during standing, while load holding does not. Changes in base of support and surface dimensions affect postural sway, potentially altering balance strategies.

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Area of Science:

  • Biomechanics
  • Human Factors Engineering
  • Occupational Safety

Background:

  • Assessing factors influencing postural stability is crucial for preventing workplace injuries.
  • Understanding how environmental and task-specific variables affect balance informs safety protocols.

Purpose of the Study:

  • To investigate the effects of single-handed load holding, base of support length, and standing surface condition on balance.
  • To quantify postural sway using center of pressure (COP) displacement measures.

Main Methods:

  • Twenty-three healthy men (18-55 years) participated.
  • Balance was assessed during quiet standing on narrow and wide construction beams.
  • Postural sway was measured via COP range (AP/ML), elliptical area, and mean sway velocity.

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Last Updated: Jun 18, 2026

A Vibrotactile Feedback Device for Seated Balance Assessment and Training
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A Modified Lean and Release Technique to Emphasize Response Inhibition and Action Selection in Reactive Balance
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Main Results:

  • Single-handed load holding did not significantly alter postural sway (p > 0.05).
  • Standing surface condition significantly affected all COP measures (p < 0.001).
  • Lengthening the base of support increased mean sway velocity (p = 0.001) but not sway range or area.

Conclusions:

  • Surface characteristics and base of support dimensions significantly influence postural sway.
  • These changes may necessitate adjustments in balance and motor control strategies.
  • Further research is needed to assess fall risk in occupational settings.