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General Rehabilitation

Exploring New Methods for Measuring Seated Movement: Comparing the Microsoft Kinect 2 and Force Plate

Saturday, October 25, 2025
8:00 AM - 9:15 AM MT
Location: Original Research Theater

    Poster Presenter(s)

  • Justin Chiu, Other

    Medical Student
    University of California, Irvine School of Medicine
    Irvine, California

    • Co-Author(s)

  • MH

    Maya N. Hatch, PhD

    Assistant Professor
    University of Rochester Medical Center
    Rochester, New York

  • VC

    Valerie Chavez-Arom, MD

    Assistant Clinical Professor
    UC Irvine School of Medicine
    Orange, California

Disclosure(s):
Justin Chiu, Other: No financial relationships to disclose
Background and/or Objectives: Existing trunk stability measures for spinal cord injury (SCI) remain under-developed, outdated, and/or cost and space prohibitive. The objective of this study is to evaluate the accuracy of the Microsoft Kinect 2 (portable 3D sensor) for capturing standardized seated trunk stability movements compared to standard force plate.

Design: Controlled, cohort study.

Setting : Single site.

Participants : 20 subjects (18-70 yrs old) have been recruited for this study; 10 individuals with thoracic SCI and 10 controls. Subjects were recruited using posted flyers, social media and word of mouth. SCI injury levels and AIS grades were confirmed the day of entry via the International Standards for Neurological Classification of SCI exam. Subjects performed 13 dynamic seated tasks (e.g. leaning with arms crossed and reaching with one arm out), while being simultaneously recorded by the Kinect 2 sensor and AMTI force plate.

Interventions: Not applicable.

Main Outcome Measures: Max velocity, max displacement and directional control were calculated for each movement. Lin’s concordance and Pearson’s correlation coefficients were run, along with Bland-Altman plots for comparisons between devices.

Results: CoP estimates from the Kinect 2 displayed excellent correlations to force plate metrics with R2 values between 0.74 - 0.92, and reliability coefficients of 2.4cm, 2.6cm/s, and 4.6cm/s for the maximum displacement, maximum outward speed, and inward speeds respectively. X-y trajectory plots show concordance for most movements, apart from forward leaning.

Conclusions: These initial results indicate estimates from the Kinect 2 are comparable to force plate measures in capturing seated movement-based parameters. With lower costs and a smaller clinical footprint, portable sensors serve as a promising new method for capturing seated stability in individuals with SCI.