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Validation of Markerless Motion Capture for Soldier Movement Patterns Assessment Under Varying Body-Borne Loads.
Isabel Coll1, Matthew P Mavor2, Thomas Karakolis3
1Ottawa-Carleton Institute of Biomedical Engineering (OCIBME), Faculty of Engineering, University of Ottawa, 75 Laurier Ave. E, Ottawa, ON, K1N 6N5, Canada. icoll077@uottawa.ca.
Annals of Biomedical Engineering
|October 7, 2024
Summary
Markerless motion capture accurately tracks soldiers' movement with heavy loads, showing potential for field performance analysis. This technology offers a viable alternative to traditional marker-based systems for assessing biomechanics under load.
Area of Science:
- Biomechanics
- Human Movement Analysis
- Military Technology
Background:
- Modern soldiers carry increasing body-borne loads due to advanced armor and equipment.
- Accurate assessment of soldier movement and biomechanics under load is crucial for performance and injury prevention.
Purpose of the Study:
- To compare the Theia3D markerless motion capture system with a marker-based gold standard.
- To evaluate the estimation of lower body kinematics, muscle activation, and joint reaction forces under various body-borne load conditions.
Main Methods:
- 16 participants performed walking and running trials with four different body-borne loads.
- Simultaneous data collection using both marker-based and markerless motion capture systems.
- Musculoskeletal analysis performed using OpenSim software.
Main Results:
- Strong correlations and acceptable differences were found between marker-based and markerless kinematics.
- Muscle activation timing (gastrocnemius lateralis/medialis) from both systems agreed with electromyography.
- Markerless system estimated higher joint reaction forces compared to the marker-based system.
Conclusions:
- Markerless motion capture demonstrates significant potential for tracking soldiers' movement patterns while carrying body-borne loads.
- The Theia3D system provides reliable kinematic and muscle activation data, comparable to marker-based systems.
- Differences in joint reaction forces highlight the need for further investigation into markerless model-specific recruitment strategies.
