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Related Experiment Video

Updated: Jun 13, 2026

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability
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Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability

Published on: September 18, 2020

Inertial Sensor Reliability and Validity Across a Five-Level Surface Instability Gradation During Single-Leg

Fani Paderi1, Analina Emmanouil1, Konstantinos Boudolos1

  • 1School of Physical Education and Sport Science, National and Kapodistrian University of Athens, 172 37 Daphne, Greece.

Sensors (Basel, Switzerland)
|June 12, 2026
PubMed
Summary

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Wearable inertial sensors provide reliable postural stability assessment, accurately tracking balance changes across varying surface challenges. These sensors are a valid tool for monitoring balance over time.

Area of Science:

  • Biomechanics
  • Sensor Technology
  • Human Movement Analysis

Background:

  • Laboratory-grade force plates are standard for postural stability assessment.
  • Portable wearable inertial sensors offer a potential alternative.
  • Validity of inertial sensors across challenging balance tasks needs further investigation.

Purpose of the Study:

  • To evaluate the reliability and concurrent validity of wearable inertial sensors against force plates for postural sway.
  • To assess sensor performance across a spectrum of five increasingly unstable surfaces.
  • To determine the suitability of inertial sensors for longitudinal clinical monitoring.

Main Methods:

  • Twenty-five healthy women performed single-leg stance on five surfaces (Floor to Bosu).
Keywords:
Bland–Altmanbalance graduationconcurrent validityforce plateinertial sensorspostural stabilityshank kinematics

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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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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

Related Experiment Videos

Last Updated: Jun 13, 2026

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability
07:52

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability

Published on: September 18, 2020

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

  • Postural sway was measured using synchronized force plates and shank-mounted inertial sensors.
  • Analysis included reliability (ICCs) and concurrent validity (concordance, method agreement).

    • Main Results:

    • Inertial sensors demonstrated excellent reliability (ICCs 0.95-0.96), surpassing force plates.
    • Moderate-to-excellent concordance was found between sensors and force plates in antero-posterior (AP) and medio-lateral (ML) directions.
    • Sensors showed high agreement in ranking individual performance, despite proportional underestimation of sway magnitude.

    Conclusions:

    • A five-level postural challenge provides a reliable balance assessment framework.
    • Shank-mounted inertial sensors are valid and robust for longitudinal monitoring.
    • Despite proportional bias in raw units, sensors accurately reflect task difficulty and individual performance.