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Related Experiment Video

Updated: Jan 9, 2026

Experimental Methods to Study Human Postural Control
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Published on: September 11, 2019

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Variability of Circular Leg Movements Is Related to Footedness and Postural Stability.

Atsushi Takagi, Naotoshi Abekawa

    IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
    |December 10, 2025
    PubMed
    Summary

    Quantifying lower limb control is crucial for daily activities. Circular leg movement variability reliably assesses postural stability and leg lateralization, offering a new functional measure for health assessment.

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    Area of Science:

    • Biomechanics
    • Neurology
    • Kinesiology

    Background:

    • Lower limb control is vital for daily activities like walking and balancing.
    • Few methods currently exist to accurately quantify lower limb control.
    • Assessing lower limb control is important for understanding fall risk and mortality.

    Purpose of the Study:

    • To evaluate if circular leg movement variability relates to lower limb control.
    • To determine if this variability reflects functional performance in postural balance.
    • To assess the reliability of this measure compared to existing metrics.

    Main Methods:

    • Twenty-five healthy participants performed 15-second circular leg movements.
    • Postural stability was assessed using one-legged stance trials on a force plate.
    • Acceleration variability, sway area, and sway velocity were measured.

    Main Results:

    • A linear relationship was found between acceleration variability and postural stability metrics (sway area, sway velocity).
    • Circular acceleration variability demonstrated higher reliability than sway metrics across repeated measurements.
    • Lateral differences in acceleration variability correlated with footedness questionnaire scores.

    Conclusions:

    • Variability of circular leg movements offers a robust assessment of lower limb lateralization.
    • This method provides a functional evaluation of postural stability.
    • Circular leg movement variability is a reliable and informative measure for assessing lower limb control.