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Mild-to-Moderate Hallux Valgus Does Not Decrease Ankle Muscle Strength in Middle-Aged Japanese Women: A Comparative

Xiaoguang Zhao1, Takehiko Tsujimoto2, Bokun Kim3

  • 1Researcher, Research Academy of Grand Health, Faculty of Sports Science, Ningbo University, Zhejiang, China.

The Journal of Foot and Ankle Surgery : Official Publication of the American College of Foot and Ankle Surgeons
|September 24, 2018
PubMed
Summary
This summary is machine-generated.

Mild hallux valgus (bunions) did not decrease ankle muscle strength in middle-aged Japanese women. Surprisingly, these women showed greater ankle inversion strength and a higher eversion-to-inversion ratio, suggesting complex biomechanical adaptations.

Keywords:
3-dimensional foot scannerankle inversion strengthdeformityfoot structurestrength ratio

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Area of Science:

  • Biomechanics
  • Orthopedics
  • Musculoskeletal Research

Background:

  • Extreme hallux valgus is linked to reduced functional ability and quality of life.
  • Foot structure and biomechanics may be negatively impacted by hallux valgus, potentially affecting ankle muscle strength.
  • Understanding the relationship between hallux valgus severity and ankle muscle function is crucial for clinical management.

Purpose of the Study:

  • To compare ankle muscle strength in individuals with varying degrees of hallux valgus.
  • To investigate the correlation between hallux valgus angles and ankle muscle strength parameters.

Main Methods:

  • Collected data on hallux valgus angles and ankle muscle strength from 31 middle-aged Japanese women.
  • Utilized a 3-dimensional foot scanner for hallux valgus angle measurement.
  • Employed a dynamometer to assess ankle muscle strength at 60º/second and 120º/second.

Main Results:

  • No significant differences in ankle muscle strength were found between normal and mild-to-moderate hallux valgus groups at either speed.
  • Mild-to-moderate hallux valgus was unexpectedly associated with greater inversion peak torque per body weight and a higher eversion-to-inversion ratio at 120º/second.
  • Hallux valgus angles positively correlated with inversion peak torque and peak torque per body weight, and negatively with the eversion-to-inversion strength ratio.

Conclusions:

  • Mild-to-moderate hallux valgus does not appear to diminish ankle muscle strength.
  • Individuals with mild-to-moderate hallux valgus may exhibit enhanced ankle inversion strength.
  • Further research is warranted to explore ankle muscle strength in cases of severe hallux valgus.