The Effects of Foot Position on Dynamic Stability during Squat in Female with Genu Varum

Eun-Kyo Chung; Bee-Oh Lim

doi:10.5763/kjsm.2018.36.4.207

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Chung and Lim: The Effects of Foot Position on Dynamic Stability during Squat in Female with Genu Varum

Clinical Article

Sports Science

The Korean Journal of Sports Medicine 2018; 36(4): 207-213.

Published online: 7 December 2018

DOI: https://doi.org/10.5763/kjsm.2018.36.4.207

The Effects of Foot Position on Dynamic Stability during Squat in Female with Genu Varum

Eun-Kyo Chung¹, Bee-Oh Lim²

¹Diabetes Center, Eulji Hospital, Seoul, Korea.

²Department of Physical Education, Chung-Ang University, Seoul, Korea.

Correspondence: 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, bolim@cau.ac.kr

Received 26 July 2018 Revised 7 November 2018 Accepted 19 November 2018

The Korean Society of Sports Medicine

(open-access):

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 (−45°, 0°, +45°) and 0° 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 (−45°, 0°, +45°) and 0° squat with band method.

Results

In anterior-posterior COP displacement, −45° foot angle and 0° squat with band were significantly showed lower than +45° foot angle squat (p=0.006). Also, in COP traveled distance, 0° squat was significantly showed lower than +45° 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 0° squat with band exercise showed higher dynamic stability and +45° foot angle squat exercise showed lower dynamic stability in female with genu varum.

Keywords: Balance, Female, Genu varum, Pressure

Figures and Tables

Fig. 1

Squat exercise methods.

Table 1

Physical characteristics of subjects

Values are presented as mean±standard deviation.

BMI: body mass index.

Table 2

Results of COP direction displacement

Values are presented as mean±standard deviation.

COP: center of pressure, A-P: anterior-posterior, M-L: medial-lateral, b: +45°, c: −45°, d: 0° band.

^**p<0.01.

Table 3

Results of COP TD, COP EA, and GRF

Values are presented as mean±standard deviation.

COP: center of pressure, TD: traveled distance, EA: ellipse area, GRF: ground reaction force, a: 0°, b: +45°, c: −45°, d: 0° band.

^*p<0.05; ^**p<0.01.

Notes

^{Conflict of Interest} No potential conflict of interest relevant to this article was reported.

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