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Contribution à l'étude du contrôle de l'équilibre à la poutre lors de la réalisation de mouvements acrobatiques de renversement par des gymnastes expertes

Abstract : The research presented in this thesis deals with gymnasts’ balance while performing acrobatic skills on the balance beam apparatus. During this event, body balance has to be maintained while performance is extremely constrained due to beam’s width (10 cm) and the altitude at which it is held (125 cm). More specifically this work contributes to a better understanding of dynamic balance control for female elite gymnasts while performing fundamental acrobatic skills, which difficulty mostly comes from the change from a foot support to a reverse hand support and involving a 180° rotation of the whole body. Experimental approach and methodology described in this thesis allows for relevant data collection in order to investigate balance while performing voluntary skills. It relies on an experimental setting including an instrumented beam allowing for the measure of external forces as well as an optoelectronic 3D motion analysis device. The first study described in this thesis aims at selecting biomechanical variables of interest in walkover skills using kinematic and kinetic data. The second study deals with the determination of how elite gymnasts are affected by beam’s height while performing these skills. A third study then evaluates to which extent sensory information availability reduction, especially implied by eyesight modulation and head positioning, influences balance control while forward walkover movement performance. The most important results shed light on modifications of centre of mass (COM) movements and center of mass-centre of pressure (COP) interaction.
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https://hal-uphf.archives-ouvertes.fr/tel-03001028
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  • HAL Id : tel-03001028, version 1

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Mélany Hars. Contribution à l'étude du contrôle de l'équilibre à la poutre lors de la réalisation de mouvements acrobatiques de renversement par des gymnastes expertes. Biomécanique [physics.med-ph]. Université de Valenciennes et du Hainaut-Cambrésis, 2007. Français. ⟨NNT : 2007VALE0022⟩. ⟨tel-03001028⟩

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