ACL INJURY-RELATED KINEMATIC ASSESSMENT: A PRELIMINARY STUDY TO COMPARE MARKER-BASED, WEARABLE, AND MARKERLESS SYSTEMS

Authors

Claudia Brunetti, Politecnico di MilanoFollow
Filippo Bertozzi, Aspire AcademyFollow
Pietro Maver, Politecnico di MilanoFollow
Marco Palombi, Politecnico di Milano
Matilde Santini, Politecnico di Milano
Manuela Galli, Politecnico di MilanoFollow
Marco Tarabini, Politecnico di MilanoFollow

Category

Technology/equipment

Document Type

Paper

Abstract

Anterior cruciate ligament (ACL) injuries often occur in non-contact situations, highlighting the need for effective risk assessment tools. This study compared kinematic outcomes of IMUs (Xsens), markerless (OpenCap) and an optoelectronic system (OMS) – considered the gold standard - in drop jumps with change of direction. Knee and hip sagittal and frontal plane kinematics were recorded concurrently with all three systems in a total of 260 trials. Xsens showed high validity for knee flexion (R²=0.81, RMSE2=0.00), limiting its use in ACL injury prevention research. OpenCap had weaker agreement with OMS (i.e., for knee flexion R²=0.76, RMSE=7.6°) and more technical issues. Although both Xsens and OpenCap are useful tools for on-field assessments, overcoming the limitations of the in-lab assessment, their suitability for precise injury screening settings requires further investigation.

Recommended Citation

Brunetti, Claudia; Bertozzi, Filippo; Maver, Pietro; Palombi, Marco; Santini, Matilde; Galli, Manuela; and Tarabini, Marco (2025) "ACL INJURY-RELATED KINEMATIC ASSESSMENT: A PRELIMINARY STUDY TO COMPARE MARKER-BASED, WEARABLE, AND MARKERLESS SYSTEMS," ISBS Proceedings Archive: Vol. 43: Iss. 1, Article 12.
Available at: https://commons.nmu.edu/isbs/vol43/iss1/12