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KMID : 1211620200150020121
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Journal of the Korean Society of Physical Medicine
2020 Volume.15 No. 2 p.121 ~ p.128
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Changes in the Cross-Sectional Area of the Abductor Hallucis During the Toe-Spread-Out Exercise at Different Ankle Positions
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Kang Seong-Tae
Kang Sun-Young
Kim Ki-Song
Jeon In-Cheol
Choung Sung-Dae
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Abstract
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Purpose: This study examined the changes in the cross-sectional area (CSA) of the abductor hallucis muscle during various ankle positions while performing toe-spread-out (TSO) exercise.
Methods: Thirty subjects with an average age of 22.1 years were recruited for this study. All subjects were firstly measured for the angle of their first metatarsophalangeal joint using a goniometer. Those with angles greater than 15° were allocated to the HV group. The remaining subjects were placed in the normal group. The CSA of the abductor hallucis was measured by ultrasound in the resting position with no movement and three ankle positions: neutral (0°), plantarflexion (30°), and dorsiflexion (30°). All data were analyzed using a two-way mixed analysis of variance between the groups (normal and HV group) and within the groups (resting, neutral, plantarflexion, and dorsiflexion) to determine the group x position interaction effects.
Results: During TSO exercise in the normal group, the CSA of the abductor hallucis was significantly greater in both the plantarflexion and neutral positions compared to the resting position (padj < .01), and plantarflexion was significantly greater than the dorsiflexion position (padj < .01). During the TSO exercise in the HV group, the CSA of the abductor hallucis for plantarflexion was significantly greater than it was for the resting, neutral, and dorsiflexion positions (padj < .01).
Conclusion: Based on the above results, the TSO exercise in plantarflexion is an effective rehabilitation exercise for subjects with HV.
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KEYWORD
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Abductor hallucis, Hallux valgus, Cross-sectional area, Toe-spread-out, Ultrasound
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