Print Email Facebook Twitter Influence of biomechanical models on joint kinematics and kinetics in baseball pitching Title Influence of biomechanical models on joint kinematics and kinetics in baseball pitching Author Gasparutto, X. (TU Delft Biomechatronics & Human-Machine Control) van der Graaff, E. (TU Delft Biomechanical Engineering; Vrije Universiteit Amsterdam) van der Helm, F.C.T. (TU Delft Biomechatronics & Human-Machine Control) Veeger, H.E.J. (TU Delft Biomechanical Engineering; TU Delft Biomechatronics & Human-Machine Control; Vrije Universiteit Amsterdam) Department Biomechanical Engineering Date 2018 Abstract In baseball pitching, biomechanical parameters have been linked to ball velocity and potential injury risk. However, although the features of a biomechanical model have a significant influence on the kinematics and kinetics of a motion, this influence have not been assessed for pitching. The aim of this study was to evaluate the choice of the trunk and shoulder features, by comparing two models using the same input. The models differed in thoraco-humeral joint definition (moving or fixed with the thorax), joint centre estimation, values of the inertial parameters and computational framework. One professional pitcher participated in the study. We found that the different features of the biomechanical models have a substantial influence on the kinematics and kinetics of the pitchers. With a fixed thoraco-humeral joint the peak average thorax angular velocity was delayed and underestimated by 17% and the shoulder internal rotation velocity was overestimated by 7%. The use of a thoraco-humeral joint fixed to the thorax will lead to an overestimation of the rotational power at the shoulder and will neglect the power produced by the forward and upward translation of the shoulder girdle. These findings have direct implications for the interpretation of shoulder muscle contributions to the pitch. Subject Inverse dynamicsmodellingoverhand throwshouldertrunk To reference this document use: http://resolver.tudelft.nl/uuid:5698671c-9dea-41b4-8638-187fbadac8b2 DOI https://doi.org/10.1080/14763141.2018.1523453 ISSN 1476-3141 Source Sports Biomechanics Part of collection Institutional Repository Document type journal article Rights © 2018 X. Gasparutto, E. van der Graaff, F.C.T. van der Helm, H.E.J. Veeger Files PDF Influence_of_biomechanica ... tching.pdf 1.86 MB Close viewer /islandora/object/uuid:5698671c-9dea-41b4-8638-187fbadac8b2/datastream/OBJ/view