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Medical & Biological Engineering & Computing

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15-07-2021 | Original Article

Two-dimensional dynamic walking stability of elderly females with a history of falls

Authors: Xing GAO, Fei SHEN, Li WANG, Yingnan MA, Haijun NIU, Yubo FAN

Published in: Medical & Biological Engineering & Computing | Issue 7-8/2021

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Abstract

Injuries related with falls are a major health risk for the elderly. Accurate evaluation of the dynamic walking stability of elderly people is the key to fall prevention. A two-dimensional (2-D) model is proposed in this study given that the custom method is mainly focused on the dynamic walking stability along the antero-posterior axis. An inverted pendulum model was utilised to calculate the region of stability at toe-off, and stability conditions were evaluated first along the antero-posterior and medio-lateral axes. The analysis was then extended to the 2-D plane. In the 2-D case, the region of stability was determined based on the use of the information of the envelope of the foot. Twenty-four female participants, categorised as healthy young, healthy elderly, and elderly with a history of falls, were examined. Significant differences among the three groups were demonstrated with the 2-D analysis method, but not in the antero-posterior or medio-lateral analyses. The centre-of-masses of elderly fallers were significantly closer to the foot-supporting boundary compared with that of healthy young and elderly adults at toe-off. A 2-D analysis method using the envelope-of-foot could evaluate the dynamic stability of elderly females based on a more accurate scale.

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Title: Two-dimensional dynamic walking stability of elderly females with a history of falls
Authors: Xing GAO
Fei SHEN
Li WANG
Yingnan MA
Haijun NIU
Yubo FAN
Publication date: 15-07-2021
Publisher: Springer Berlin Heidelberg
Published in: Medical & Biological Engineering & Computing / Issue 7-8/2021
Print ISSN: 0140-0118
Electronic ISSN: 1741-0444
DOI: https://doi.org/10.1007/s11517-021-02410-1

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