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A Comparison of the Gait Harmonic Ratio between Faller and Non-faller Iranian Older Adults, under Single-task and Dual-task Conditions

Document Type : Original Article

Authors

1 Ph.D., Musculoskeletal Rehabilitation Research Center, Department of Physical Therapy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran

2 M.Sc., Musculoskeletal Rehabilitation Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran

3 Ph.D., Department of Physical Therapy, School of Rehabilitation Sciences, Shiraz University of Medical Sciences, Shiraz, Iran

4 Ph.D., Rehabilitation Research Center, Department of Rehabilitation Management, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran

Abstract

Introduction: Performing a secondary task while maintaining postural control can aggravate balance impairments among older individuals. The present study aimed to compare the gait harmonic ratio between faller and non-faller community-dwelling older adults.
Methods: In this cross-sectional study, 20 faller older adults (13 females and 7 males) and 20 non-faller older adults (12 females and 8 males) were recruited from the members of a retirement center. Before the trial, a medical code of ethics was granted and the written consent forms were signed by all participants. The variable, the gait harmonic ratio in medial-lateral, vertical, and anterior-posterior directions under single-task and dual-task conditions, was measured using an accelerometer.
Results: Under the single-task condition, there was no statistically significant difference between the faller and non-faller groups in any direction of gait harmonic ratio. Under the dual-task condition, the faller group revealed significantly lower harmonic ratios in medial-lateral (p < /em>=0.010) and vertical (p < /em>=0.032) directions compared to the non-faller group. However, no statistically significant difference was reported between the two groups for the anterior-posterior direction in dual-task walking.
Conclusions: The findings of the present study indicated that the medial-lateral and vertical gait harmonic ratios can considerably be affected under dual-task conditions in faller older individuals.

Keywords

References
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Sadra Medical Journal
Volume 9, Issue 2
April 2021
Pages 161-172
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