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http://dx.doi.org/10.13066/kspm.2017.12.1.75

Comparison of the Activity of the Abductor Hallucis Muscle during Short-foot Exercises using Foot Orthosis and the Windlass Effect in Sitting and One-leg Standing Positions  

Kim, Do-Hyun (Dept. of KEMA Therapy, Graduate School of Humanities Industry, Joongbu University)
Jung, Do-Young (Department of Physical Therapy, Kinesiopathologic Institute, Joongbu University)
Publication Information
Journal of the Korean Society of Physical Medicine / v.12, no.1, 2017 , pp. 75-81 More about this Journal
Abstract
PURPOSE: The purpose of this study was to compare the activity of the abductor hallucis (AbdH) muscle during short foot exercise (SFE) using foot orthosis (SFE-FO) and the windlass effect (SFO-WE) while sitting and in a one-leg standing position. METHODS: We recruited fourteen subjects with normal feet for this study. Surface electromyography (EMG) was used to measure the muscle activity of the AbdH muscle during SFE, SFE-FO, and SFE-WE while sitting and in a one-leg standing position. Three trials consisting of a 5 s hold for each of the three exercises were performed to measure the EMG activity of the AbdH muscle. Exercise type and position were randomly assigned. Two-way repeated-measures ANOVA was used to analyze the effects of exercise type (SFE vs. SFE-FO vs. SFE-WE) and position (sitting vs. one-leg standing position) on AbdH muscle activity. A statistical significance was set at ${\alpha}=.05$. RESULTS: The EMG activity of AbdH muscle in the SFE-WE exercise was significantly greater than that during SFE and SFE-FO in both exercise positions (p<.001). In addition, the EMG activity of the AbdH muscle in the one-leg standing position was significantly higher than that while sitting (p<.001) during all three exercises. CONCLUSION: These results suggest that SFE-WE is a more effective strengthening exercise than SFE or SFE-FO for activating the AbdH muscle.
Keywords
Abductor hallucis muscle; Plantar intrinsic muscles; Short-foot exercise; Windlass effect;
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