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Category

Modelling / Simulation

Document Type

Paper

Abstract

This study aims to understand how much different ways of modelling the scapular motion in musculoskeletal models influence the estimated inverse dynamics torques at the glenohumeral joint in simulations of volleyball hitting. We collected hitting motion data of one advanced volleyball player and compared the scapular motion and inverse dynamics torques at the glenohumeral joint estimated using three different musculoskeletal models that model the scapular motion in different ways. We found root mean squared differences of up to 50 Nm in inverse dynamics torques estimated from the different models and coupling between scapula and humerus can affect these estimates. Highest marker tracking errors were observed in the model with lowest number of independent scapular degrees of freedom suggesting scapular degrees of freedom should be carefully chosen.

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