Print Email Facebook Twitter Power in sports Title Power in sports: A literature review on the application, assumptions, and terminology of mechanical power in sport research Author van der Kruk, E. (TU Delft Biomechatronics & Human-Machine Control) 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) Schwab, A.L. (TU Delft Biomechatronics & Human-Machine Control) Department Biomechanical Engineering Date 2018 Abstract The quantification of mechanical power can provide valuable insight into athlete performance because it is the mechanical principle of the rate at which the athlete does work or transfers energy to complete a movement task. Estimates of power are usually limited by the capabilities of measurement systems, resulting in the use of simplified power models. This review provides a systematic overview of the studies on mechanical power in sports, discussing the application and estimation of mechanical power, the consequences of simplifications, and the terminology. The mechanical power balance consists of five parts, where joint power is equal to the sum of kinetic power, gravitational power, environmental power, and frictional power. Structuring literature based on these power components shows that simplifications in models are done on four levels, single vs multibody models, instantaneous power (IN) versus change in energy (EN), the dimensions of a model (1D, 2D, 3D), and neglecting parts of the mechanical power balance. Quantifying the consequences of simplification of power models has only been done for running, and shows differences ranging from 10% up to 250% compared to joint power models. Furthermore, inconsistency and imprecision were found in the determination of joint power, resulting from inverse dynamics methods, incorporation of translational joint powers, partitioning in negative and positive work, and power flow between segments. Most inconsistency in terminology was found in the definition and application of ‘external’ and ‘internal’ work and power. Sport research would benefit from structuring the research on mechanical power in sports and quantifying the result of simplifications in mechanical power estimations. Subject Mechanical powerInternal powerExternal powerMechanical energy expenditureJoint power To reference this document use: http://resolver.tudelft.nl/uuid:a1e9d161-7c6e-4452-b68b-291f08117c55 DOI https://doi.org/10.1016/j.jbiomech.2018.08.031 Embargo date 2019-09-18 ISSN 0021-9290 Source Journal of Biomechanics, 79, 1-14 Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type review Rights © 2018 E. van der Kruk, F.C.T. van der Helm, H.E.J. Veeger, A.L. Schwab Files PDF vanderKruk_2018_POWER_IN_ ... e_copy.pdf 1.32 MB Close viewer /islandora/object/uuid:a1e9d161-7c6e-4452-b68b-291f08117c55/datastream/OBJ/view