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Related Experiment Video

Updated: May 23, 2026

Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings
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Detecting and quantifying global instability during a dynamic task using kinetic and kinematic gait parameters.

Eytan M Debbi1, Alon Wolf, Amir Haim

  • 1Biorobotics and Biomechanics Lab, Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa, Israel. eytan.debbi@aya.yale.edu

Journal of Biomechanics
|April 14, 2012
PubMed
Summary

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Researchers identified specific kinetic and kinematic gait parameters sensitive to dynamic instability. Stride-to-stride variability in knee varus moment effectively quantifies the magnitude of gait instability.

Area of Science:

  • Biomechanics
  • Gait Analysis
  • Human Movement Science

Background:

  • Gait instability detection often relies on spatiotemporal parameters.
  • Kinetic and kinematic gait parameters for instability detection remain underexplored.
  • Measures to quantify the magnitude of gait instability are needed.

Purpose of the Study:

  • Identify kinetic and kinematic gait parameters that best detect instability.
  • Determine which parameters can quantify the magnitude of gait instability.

Main Methods:

  • Ten healthy men participated in gait analysis under three controlled instability conditions.
  • A controlled perturbation device (AposTherapy System) was used to apply instability.
  • Statistical analysis (Friedman and Wilcoxon tests) compared gait parameters across instability stages.

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Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb

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Last Updated: May 23, 2026

Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings
06:21

Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings

Published on: July 26, 2022

Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb
08:24

Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb

Published on: August 30, 2016

Main Results:

  • Stride-to-stride variability (STSV) in most kinetic and kinematic measures increased significantly with instability.
  • Knee flexion moment, knee varus moment, knee flexion angle, and hip adduction angle showed significant increases.
  • STSV in knee varus moment uniquely increased significantly between mild and moderate instability stages.

Conclusions:

  • Kinetic and kinematic gait parameters are sensitive to dynamic instability.
  • Knee-specific parameters are particularly sensitive to gait instability.
  • STSV in knee varus moment can quantify the magnitude of dynamic gait instability.