Effect of Arch Height Flexibility in Individuals With Flatfoot on Abductor Hallucis Muscle Activity and Medial Longitudinal Arch Angle During Short Foot Exercises

医学 灵活性(工程) 口腔正畸科 足部矫形器 脚(韵律) 拱门 畸形 足畸形 物理医学与康复 物理疗法 外科 数学 运动学 结构工程 语言学 经典力学 统计 物理 工程类 哲学
作者
Haruki Ishiyama,Tomoya Takabayashi,Shiori Hiratsuka,Wataru Ito,Takanori Kikumoto,Masayoshi Kubo
出处
期刊:Journal of Foot & Ankle Surgery [Elsevier BV]
卷期号:62 (1): 168-172 被引量:3
标识
DOI:10.1053/j.jfas.2022.06.007
摘要

Flatfoot presents decreased medial longitudinal arch (MLA), and such foot deformity involves intrinsic foot muscles dysfunction. Flatfoot can be classified into flexible and stiff types according to arch height flexibility (AHF). Short foot exercise (SFE) is an intrinsic foot muscle strengthening exercise, which is reportedly effective against flatfoot. However, its effectiveness against flexible or stiff types in flatfoot is unclear. We examined the effect of AHF in individuals with flatfoot during abductor hallucis muscle (AbH) activity and medial longitudinal arch during SFE. Foot alignment was assessed using the arch height index during standing, and individuals with flatfoot (N = 16) were recruited. The AbH activity and MLA angle during SFE while maintaining single-leg standing were assessed. The relationship between AHF and AbH activity and between AHF and MLA angle ratio was analyzed using correlation coefficients. Additional correlations between AHF and AbH activity were observed with the outliers removed. There were no correlations between AHF and AbH muscle activity and between AHF and MLA angle ratio. However, with the 2 outliers removed, moderate correlations between AHF and AbH activity were significant (r = 0.64, p = .01). AbH activity during SFE increased in individuals with flatfoot for high AHF (flexible type). Thus, SFE may be more effective for individuals with flatfoot having a high AHF. These findings may be helpful when making decisions for surgery and rehabilitation.
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