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The Effects of Foot Position on Dynamic Stability during Squat in Female with Genu Varum
Korean J Sports Med 2018;36:207-213
Published online December 1, 2018;  https://doi.org/10.5763/kjsm.2018.36.4.207
© 2018 The Korean Society of Sports Medicine.

Eun-Kyo Chung1, Bee-Oh Lim2

1Diabetes Center, Eulji Hospital, Seoul, 2Department of Physical Education, Chung-Ang University, Seoul, Korea
Correspondence to: Bee-Oh Lim
Department of Physical Education, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea
Tel: +82-2-820-5121, Fax: +82-2-812-2729 E-mail: bolim@cau.ac.kr
Received July 26, 2018; Revised November 7, 2018; Accepted November 19, 2018.
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
Purpose: The aim of this study was to investigate the effects of foot position on dynamic stability in female with genu varum.
Methods: Eight females with genu varum participated in this study and performed the four squat exercise methods that foot position (-45o, 0o, 竊45o) and 0o squat with band. Center of pressure (COP; anterior-posterior, medial-lateral, traveled distance, ellipse area) and ground reaction force as dynamic stability were measured using footscan system. Multivariate analysis of variance and one-way repeated analysis of variance measurement with Tukey honestly significant difference were used to identify significant differences of foot angle (-45o, 0o, 竊45o) and 0o squat with band method.
Results: In anterior-posterior COP displacement, -45o foot angle and 0o squat with band were significantly showed lower than 竊45o foot angle squat (p=0.006). Also, in COP traveled distance, 0o squat was significantly showed lower than 竊45o foot angle (p=0.019). During the descending phase, ground reaction force significantly showed in -45 foot angle was lower than other exercise methods.
Conclusion: The 0o squat with band exercise showed higher dynamic stability and 竊45o foot angle squat exercise showed lower dynamic stability in female with genu varum.
Keywords : Balance, Female, Genu varum, Pressure
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