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The immediate effects of foot pressure based insole on ankle dorsiflexion range of motion, postural sway, and muscle activation in healthy adults with genu varum
Phys Ther Rehabil Sci 2018;7:164-71
Published online December 30, 2018
© 2018 Korean Academy of Physical Therapy Rehabilitation Science.

Hye-Lim Chuna, and Byoung-Hee Leeb

aDepartment of Physical Therapy, Health and Welfare Graduate School, Sahmyook University, Seoul, Republic of Korea
bDepartment of Physical Therapy, College of Health Science and Social Welfare, Sahmyook University, Seoul, Republic of Korea
Correspondence to: Byoung-Hee Lee (ORCID https://orcid.org/0000-0001-9766-6068)
Department of Physical Therapy, College of Health Science and Social Welfare, Sahmyook University, 815 Hwarang-ro, Nowon-gu, Seoul 01795, Republic of Korea
Tel: 82-2-3399-1634 Fax: 82-2-3399-1639 E-mail: 3679@syu.ac.kr
Received November 20, 2018; Revised December 17, 2018; Accepted December 17, 2018.
cc This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Objective: The purpose of this research was to determine the immediate effects of wearing a foot-pressure-based insole (FPBI) on ankle dorsiflexion range of motion (DFROM), postural sway, and muscle activation in healthy individuals with genu varum.
Design: Cross-sectional study.
Methods: This study was conducted on thirteen adults, with six male and seven females subjects. The mean age was 24.08 years. Foot pressure was measured to apply the FPBI and the weight bearing lunge test was performed with the application of a flat insole (FI) and FPBI. Examination was randomly performed in four conditions to measure both postural sway and muscle activation. All participants applied both the FI and FPBI with four conditions. The four conditions were as follows: 1) Romberg test posture with eyes closed, 2) Romberg test posture with eyes opened, 3) dominant single leg standing with eyes opened, and 4) non-dominant single leg standing with eyes opened.
Results: For ankle DFROM between the FI and FPBI, a significant increase was observed in both the dominant and non-dominant leg (p<0.05). For postural sway between the FI and FPBI in the Romberg test posture with eyes closed and dominant single leg standing with eyes opened conditions, a significant decrease was observed (p<0.05). However, the postural sway between FI and FPBI in the Romberg test posture with eyes opened and non-dominant single leg standing with eyes opened, no significant decrease was observed. Also, there were no significant effects on muscle activation between the application of the FI and FPBI.
Conclusions: The result showed that FPBI immediately improved ankle DFROM and postural sway. It seems that FPBI may improve genu varum in healthy individuals with genu varum.
Keywords : Ankle dorsiflexion range of motion, Genu varum, Orthotic devices, Postural balance

 

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