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Postural stability when walking: Effect of the frequency and magnitude of lateral oscillatory motion

Postural stability when walking: Effect of the frequency and magnitude of lateral oscillatory motion
Postural stability when walking: Effect of the frequency and magnitude of lateral oscillatory motion
While walking on an instrumented treadmill, 20 subjects were perturbed by lateral sinusoidal oscillations representative of those encountered in transport: frequencies in the range 0.5-2 Hz and accelerations in the range 0.1-2.0 ms-2 r.m.s., corresponding to velocities in the range 0.032-0.16 ms-1 r.m.s. Postural stability was assessed from the self-reported probability of losing balance (i.e., perceived risk of falling) and the movements of the centre of pressure beneath the feet. With the same acceleration at all frequencies, the velocities and displacements of the oscillatory perturbations were greater with the lower frequency oscillations, and these caused greater postural instability. With the same velocity at all frequencies, postural instability was almost independent of the frequency of oscillation. Movements of the centre of pressure show that subjects attempted to compensate for the perturbations by increasing their step width and increasing their step rate.
postural stability, walking, lateral oscillatory motion
0003-6870
293-299
Sari, Hatice Mujde
40c88cee-1c23-4b43-bece-df030a16203f
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Sari, Hatice Mujde
40c88cee-1c23-4b43-bece-df030a16203f
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8

Sari, Hatice Mujde and Griffin, Michael J. (2014) Postural stability when walking: Effect of the frequency and magnitude of lateral oscillatory motion. Applied Ergonomics, 45, 293-299. (doi:10.1016/j.apergo.2013.04.012). (PMID:23684118)

Record type: Article

Abstract

While walking on an instrumented treadmill, 20 subjects were perturbed by lateral sinusoidal oscillations representative of those encountered in transport: frequencies in the range 0.5-2 Hz and accelerations in the range 0.1-2.0 ms-2 r.m.s., corresponding to velocities in the range 0.032-0.16 ms-1 r.m.s. Postural stability was assessed from the self-reported probability of losing balance (i.e., perceived risk of falling) and the movements of the centre of pressure beneath the feet. With the same acceleration at all frequencies, the velocities and displacements of the oscillatory perturbations were greater with the lower frequency oscillations, and these caused greater postural instability. With the same velocity at all frequencies, postural instability was almost independent of the frequency of oscillation. Movements of the centre of pressure show that subjects attempted to compensate for the perturbations by increasing their step width and increasing their step rate.

Text
14740 HMA-MJG 2014 Walking_stability_during_lateral_oscillation - Accepted Manuscript
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More information

Accepted/In Press date: 2013
e-pub ahead of print date: 16 May 2013
Published date: 2014
Keywords: postural stability, walking, lateral oscillatory motion
Organisations: Human Sciences Group

Identifiers

Local EPrints ID: 355012
URI: http://eprints.soton.ac.uk/id/eprint/355012
ISSN: 0003-6870
PURE UUID: 85427a25-8ae2-426f-a44c-fe31c1b63b86
ORCID for Michael J. Griffin: ORCID iD orcid.org/0000-0003-0743-9502

Catalogue record

Date deposited: 24 Jul 2013 15:58
Last modified: 14 Mar 2024 14:27

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Contributors

Author: Hatice Mujde Sari
Author: Michael J. Griffin ORCID iD

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