Friday, April 5, Institut national du sport, de l’expertise et de la performance (Insep), in the heart of the Bois de Vincennes, in Paris. Equipped with sensors distributed on the arms, hips and legs, the Lebrun brothers chain together smashes in front of Daniel Dinu. Since 2021, at least four times a year, this biomechanics engineer welcomes the two great Olympic hopes of table tennis to this temple of French sport in order to carry out a battery of tests. On the screens of his computers, the avatars of Félix and Alexis Lebrun collect 200 data per second. Speed of hitting and ball, acceleration of the body, movements of the arms, legs or hips, the entire mechanical mapping of their gestures is captured using a gyrometer, an accelerometer and a magnetometer. These raw elements, unusable as they are, are then integrated and analyzed in the software developed by the researcher’s team in the Matlab environment. “This tool, with 100 million lines of code, is unique in the world, and I weigh my words,” says Daniel Dinu, who is also the referent for scientific support at Insep. Twenty-four hours after these tests, the coaches will receive an ultra-detailed document that will allow them to modulate the exercises of the two table tennis players and refine certain specific points.
Because if engineers are at the heart of the preparation for the Paris 2024 Games, it is the coaches who make the final decisions. “That’s the rule I (…)
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