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KMID : 1211620170120010075
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Journal of the Korean Society of Physical Medicine
2017 Volume.12 No. 1 p.75 ~ p.81
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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
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Kim Do-Hyun
Jung Do-Young
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Abstract
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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.
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KEYWORD
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Abductor hallucis muscle , Plantar intrinsic muscles , Short-foot exercise , Windlass effect
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