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Predictive Measurement for Windlass Change in Length and Selected Treatment Outcomes in Chronic Plantar Fasciitis
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Arch index measurement method based on plantar distributed force.

Baoliang Chen1, Xiaofan Ma2, Feiyun Xiao2

  • 1School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China; Intelligent Interconnected Systems Laboratory of Anhui Province (Hefei University of Technology), China.

Journal of Biomechanics
|October 3, 2022
PubMed
Summary
This summary is machine-generated.

A novel foot arch index (FAI) using plantar force measurement accurately assesses arch height. This method offers a reliable, non-invasive approach for foot biomechanics research.

Keywords:
Arch indexDistributed forceFAIForce platformSupport surface

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Area of Science:

  • Biomechanics
  • Podiatry
  • Orthopedics

Background:

  • Assessing foot arch height is crucial for understanding foot function and diagnosing related conditions.
  • Traditional methods for measuring arch height can be invasive or lack precision.
  • A non-invasive, accurate method for foot arch index (FAI) measurement is needed.

Purpose of the Study:

  • To propose and validate a new foot arch index (FAI) method based on plantar force measurement.
  • To compare the proposed FAI method with the established arch height index (AHI) measurement.

Main Methods:

  • Divided the entire pelma into posterior heel (HP), lateral sole (SL), and medial sole (SM) based on three-point support mechanics.
  • Utilized a distributed force platform to determine center of pressure (CoP) trajectories (A, B, C, O).
  • Defined FAI as the area ratio of triangle BOC to triangle ABC, correlating arch height with the distance from point O to the triangle ABC boundary.

Main Results:

  • The Pearson correlation coefficient between the FAI and AHI methods was 0.79 (p＜0.0001).
  • Bland-Altman analysis indicated good agreement between the two measurement methods.
  • ANOVA confirmed the statistical significance of FAI (F=18.81, p＜0.001) and significant differences between arch height groups.

Conclusions:

  • The proposed distributed force measurement method provides reliable support surface boundary information.
  • This FAI method is a valid and accurate tool for assessing foot arch height.
  • The findings support the use of plantar force measurement for non-invasive foot biomechanical analysis.