MARKERLESS MOTION CAPTURE WITH OPENCAP FOR FIELD-BASED JUMP TESTING: A FORCE TO BE RECKONED WITH?

Authors

Jasper Verheul, Cardiff Metropolitan UniversityFollow
Mark A. Robinson, Liverpool John Moores UniversityFollow
Sophie Burton, Cardiff Metropolitan UniversityFollow

Category

Methods

Document Type

Paper

Abstract

Field-based methods to assess external kinetics are essential for regular biomechanical monitoring. The aim of this study was to examine the accuracy of ground reaction forces (GRF) estimated from segmental kinematics, measured with a markerless motion-capture system (OpenCap) during jumping. Full-body segmental kinematics were recorded for fifteen athletes during countermovement, squat, and drop jumps, and used to estimate vertical GRFs with a mechanics-based method. Across jumps, bias and limits of agreement were acceptable (<15%) for 23 and 22 GRF variables, respectively. Within-athlete changes between arm-swing or leg-dominance conditions were adequately detected for multiple GRF variables. These findings show that a low-cost markerless motion-capture system (OpenCap) may be used to estimate and assess force variables of interest in field settings.

Recommended Citation

Verheul, Jasper; Robinson, Mark A.; and Burton, Sophie (2024) "MARKERLESS MOTION CAPTURE WITH OPENCAP FOR FIELD-BASED JUMP TESTING: A FORCE TO BE RECKONED WITH?," ISBS Proceedings Archive: Vol. 42: Iss. 1, Article 212.
Available at: https://commons.nmu.edu/isbs/vol42/iss1/212