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Related Experiment Video

Updated: Jul 16, 2026

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

Development, Reliability, and Validity Assessment of a Portable 3D Camera-Based System for Quantifying Postural Sway

Vivek Ganesh Sonar1, Vibhor Agrawal2, Krushal Kalkani2

  • 1Department of Computer Science & Electrical Engineering, Florida Atlantic University, Boca Raton, FL 33431, USA.

Sensors (Basel, Switzerland)
|July 15, 2026
PubMed
Summary

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A new portable 3D camera system accurately measures postural sway for balance assessment. This reliable and valid technology offers a low-cost, accessible alternative to traditional lab-based systems for evaluating fall risk.

Area of Science:

  • Biomechanics
  • Medical Technology
  • Rehabilitation Engineering

Background:

  • Accurate postural sway assessment is crucial for balance disorders, rehabilitation, and fall risk evaluation.
  • Traditional laboratory-based motion capture systems are precise but costly and lack portability.
  • There is a need for accessible, portable solutions for balance assessment.

Purpose of the Study:

  • To develop and validate a portable three-dimensional (3D) camera system for quantifying postural sway and balance.
  • To assess the test-retest reliability and concurrent validity of the new system.

Main Methods:

  • A portable 3D camera system (Intel RealSense D415) was developed and tested.
  • Test-retest reliability was assessed in healthy adults (n=10).
Keywords:
3D depth cameracenter of masspostural swayreliabilityvalidity

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

Last Updated: Jul 16, 2026

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

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

  • Concurrent validity was established against a laboratory-based optical motion capture system (Optotrak).

    • Main Results:

    • High test-retest reliability was observed (Intraclass Correlation Coefficients [ICCs] = 0.84-0.86).
    • Strong correlations and high agreement were found when comparing with Optotrak measurements (mean absolute percentage error of 10.5%).
    • The system operates at 30 Hz with low latency (<40 ms).

    Conclusions:

    • The RealSense-based system is a reliable, valid, and portable tool for postural sway assessment.
    • It presents a promising low-cost alternative to expensive, non-portable laboratory systems.
    • Further validation in clinical populations is recommended before widespread clinical deployment.