The NePTUNE project is a project funded by the French National Agency of Research (ID: ANR-19-STHP-0004 NePTUNE) concerning the call “Sport of Very High Performance” (https://anr.fr/en/call-for-proposals-details/call/dfed2a01f16751361be6f6421e781191/), especially the 7th challenge about “big-data and artificial intelligence to support performance”. The NePTUNE project is a multi-disciplinary project supported by the French Federation of Swimming (FFN) and French Federation of Handisport (FFH), a consortium of 5 high schools (ENPC, ENS Polytechnique, Centrale and INSA) and 3 universities (University of Rouen, Picardie, Paris XIII). The aim of the project is to provide tools and methods in order to improve and to monitor top elite swimmers of the French team for the 2024 Paris Olympics and Paralympics games (http://www.sports.gouv.fr/presse/article/appel-a-projets-sport-de-tres-hauteperformance). The current post-doc or research engineer position concerns Work Package n°3 of the project, which investigates how stroke rate and speed influence motor coordination and energetic cost.