Speeding up or slowing down?:Gait adaptations to preserve gait stability in response to balance perturbations

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Speeding up or slowing down?:Gait adaptations to preserve gait stability in response to balance perturbations

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Hak, Laura / Houdijk, Han / Steenbrink, Frans / Mert, Agali / van der Wurff, Peter / Beek, Peter J. / van Dieen, Jaap H.

Abstract

It has frequently been proposed that lowering walking speed is a strategy to enhance gait stability and to decrease the probability of falling. However, previous studies have not been able to establish a clear relation between walking speed and gait stability. We investigated whether people do indeed lower walking speed when gait stability is challenged, and whether this reduces the probability of falling. Nine healthy subjects walked on the Computer Assisted Rehabilitation ENvironment (CAREN) system, while quasi-random medio-lateral translations of the walking surface were imposed at four different intensities. A self-paced treadmill setting allowed subjects to regulate their walking speed throughout the trials. Walking speed, step length, step frequency, step width, local dynamic stability (LDS), and margins of stability (MoS) were measured. Subjects did not change walking speed in response to the balance perturbations (p = 0.118), but made shorter, faster, and wider steps (p <0.01) with increasing perturbation intensity. Subjects became locally less stable in response to the perturbations (p <0.01), but increased their MoS in medio-lateral (p <0.01) and backward (p <0.01) direction. In conclusion, not a lower walking speed, but a combination of decreased step length and increased step frequency and step width seems to be the strategy of choice to cope with medio-lateral balance perturbations, which increases MoS and thus decreases the risk of falling. (C) 2012 Elsevier B.V. All rights reserved.

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Dokumentinformationen

Titel :

Speeding up or slowing down?:Gait adaptations to preserve gait stability in response to balance perturbations

Beteiligte:

Hak, Laura (Autor:in) / Houdijk, Han (Autor:in) / Steenbrink, Frans (Autor:in) / Mert, Agali (Autor:in) / van der Wurff, Peter (Autor:in) / Beek, Peter J. (Autor:in) / van Dieen, Jaap H. (Autor:in)

Erscheinungsdatum :

2012-06-01

Anmerkungen:

Hak , L , Houdijk , H , Steenbrink , F , Mert , A , van der Wurff , P , Beek , P J & van Dieen , J H 2012 , ' Speeding up or slowing down? Gait adaptations to preserve gait stability in response to balance perturbations ' , Gait & Posture , vol. 36 , no. 2 , pp. 260-264 . https://doi.org/10.1016/j.gaitpost.2012.03.005 ; ISSN:0966-6362

DOI :

https://doi.org/10.1016/j.gaitpost.2012.03.005

Medientyp :

Aufsatz (Zeitschrift)

Format :

Elektronische Ressource

Sprache :

Englisch

Schlagwörter :

Balance perturbations , Walking speed , Step length , Step frequency , Step width , LOCAL DYNAMIC STABILITY , WALKING , VARIABILITY , SENSITIVITY , MOTION