Related Experiment Video
Updated: Jul 17, 2025
06:52
An Inertial Measurement Unit Based Method to Estimate Hip and Knee Joint Kinematics in Team Sport Athletes on the Field
Published on: May 26, 2020
8.0K
Intrarater and Interrater Reliability and Agreement of a Method to Quantify Lower-Extremity Kinematics Using Remote
Margaret S Harrington1, Ikeade C Adeyinka1, Timothy A Burkhart1
1Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, ON, Canada.
Journal of Sport Rehabilitation
|August 29, 2023
Summary
Remote 2D markerless motion tracking (Kinovea) shows good to excellent reliability for quantifying knee and hip angles during squats. This method supports remote lower-extremity kinematics analysis in research and clinics.
Area of Science:
- Biomechanics
- Human Movement Analysis
- Digital Health
Background:
- Assessing lower-extremity joint angles is crucial for clinical assessments and research.
- Traditional motion capture methods can be costly and require specialized facilities.
- Remote markerless motion tracking offers a potential alternative for accessible kinematic analysis.
Purpose of the Study:
- To evaluate the reliability and agreement of the Kinovea software for remote 2D markerless motion tracking.
- To quantify knee and hip angles during dynamic lower-extremity movements like squats and lunges.
- To determine the suitability of this method for research and clinical applications.
Main Methods:
- Fourteen healthy adults performed bodyweight squats and lateral lunges at home, recorded via video.
- Knee and hip angles were analyzed in the sagittal (squats) and frontal (lunges) planes using Kinovea.
- Intrarater and interrater reliability were assessed using intraclass correlation coefficients and a validation metric, with standard error of measurement (SEM) calculated.
Main Results:
- High reliability (ICC = .80-.98) was found for joint angles at maximum depth during squats.
- Acceptable agreement was observed for most squat-related joint angle-time signals, except for interrater hip angles.
- None of the lateral lunge variables met the acceptable agreement threshold; however, SEM values were consistently below 5° for all measurements.
Conclusions:
- The Kinovea software demonstrates good to excellent reliability for quantifying lower-extremity joint angles during dynamic tasks, particularly squats.
- While some limitations exist for lateral lunges, the overall findings support the use of remote markerless motion tracking.
- This technology can be integrated into research and clinical settings for accessible and reliable kinematic analysis.
