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Related Experiment Video

Updated: Jun 26, 2026

Computerized Dynamic Posturography for Postural Control Assessment in Patients with Intermittent Claudication

Computerized Dynamic Posturography for Postural Control Assessment in Patients with Intermittent Claudication

Published on: December 11, 2013

Destabilizing and stabilizing forces to assess equilibrium during everyday activities.

C Duclos¹, P Desjardins, S Nadeau

¹Centre de Recherche Interdisciplinaire en Réadaptation (CRIR), Institut de Réadaptation Gingras-Lindsay de Montréal (IRGLM), 6300 Avenue Darlington, Montréal, QC, Canada H3S 2J4. cyril.duclos@umontreal.ca

Journal of Biomechanics

|January 10, 2009

Summary

This study introduces a new dynamic stability model for assessing postural control. The model indicates that older adults with slower walking speeds have reduced dynamic stability, highlighting areas for future research.

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Area of Science:

Biomechanics
Gerontology
Human Movement Science

Background:

Postural stability is crucial for performing daily functional activities.
Existing models may not fully capture the dynamic interplay of forces during postural control.

Purpose of the Study:

To introduce a novel dynamic stability model.
To quantify postural stability using a ratio of destabilizing to stabilizing forces.
To assess the model's preliminary efficacy in older adults.

Main Methods:

Development of a new dynamic stability model incorporating equilibrium and effort-based forces.
Calculation of a stability index based on the ratio of destabilizing to stabilizing forces.
Collection of preliminary data during walking in older adults at preferred and maximal safe speeds.

Main Results:

Subjects with reduced maximal gait speed exhibited lower destabilizing and stabilizing forces.
Stabilizing force increased significantly (2-3 times) with increased gait speed.
Destabilizing force showed minimal change with variations in gait speed.

Conclusions:

The proposed dynamic stability model identifies lower stability in older adults with reduced maximal gait speed.
Preliminary findings support the model's potential for assessing dynamic stability.
Further large-scale studies are warranted for model validation and application to diverse functional tasks.