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Related Experiment Video

Updated: May 1, 2026

Home-Based Monitor for Gait and Activity Analysis
07:24

Home-Based Monitor for Gait and Activity Analysis

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A wearable system for multi-segment foot kinetics measurement.

H Rouhani1, J Favre1, X Crevoisier2

  • 1Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratory of Movement Analysis and Measurement, ELH 137/ Station 11, CH-1015 Lausanne, Switzerland.

Journal of Biomechanics
|March 25, 2014
PubMed
Summary

A new wearable system accurately measures multi-segment foot joint kinetics during walking. This technology shows promise for evaluating foot treatments in clinical settings.

Keywords:
GaitInertial sensorsInverse dynamicsMulti-segment foot kineticsPressure insole

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Area of Science:

  • Biomechanics
  • Wearable Technology
  • Clinical Assessment

Background:

  • Accurate measurement of foot joint kinetics is crucial for understanding gait and evaluating treatments.
  • Existing methods for foot kinetics analysis often rely on complex laboratory setups.
  • A need exists for a portable and reliable system for multi-segment foot kinetics during dynamic activities like walking.

Purpose of the Study:

  • To design and validate a wearable system for measuring multi-segment foot joint kinetics.
  • To assess the system's suitability for clinical evaluations in healthy elderly subjects and patients with ankle osteoarthritis.
  • To compare the multi-segment foot model's kinetic measurements with a single-segment model.

Main Methods:

  • A wearable system integrating inertial sensors (gyroscopes, accelerometers) and a plantar pressure insole was developed.
  • Subjects (10 healthy elderly, 12 osteoarthritis patients) performed 50m walks wearing the system.
  • Inverse dynamics calculations were used to determine 3D forces, moments, and power in foot joints (toes, forefoot, hindfoot, shank).

Main Results:

  • The multi-segment model showed normalized RMS differences <15% compared to a previous single-segment model for ankle joint moments and power.
  • Significant differences in forces and moments were observed between patients and healthy subjects in shank-hindfoot and hindfoot-forefoot joints.
  • The system demonstrated acceptable inter-subject repeatability (CMC>0.70 for patients, CMC>0.90 for healthy subjects), except for power and forefoot-toes joint parameters.

Conclusions:

  • The developed wearable system provides acceptable repeatability for estimating multi-segment foot joint kinetics.
  • The system's kinetic parameters can differentiate between patients with ankle osteoarthritis and healthy individuals.
  • This wearable system is a promising tool for outcome evaluations in foot treatment studies.