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Évaluation biomécanique des capacités musculo-squelettiques lors de la transition assis / debout au moyen d'une centrale inertielle en situation écologique

Abstract : Physical abilities are directly related to healthy aging. Thus, it is essential to be able to estimate them quickly and simply during clinical routines. In this thesis, we focused on the sit-to-stand transition that is already used in geriatrics and that constitutes a movement in everyday life that becomes more complex for people whose physical capacities decrease. The quantification of this movement was proposed using a magneto-inertial measurement unit fixed on the chest. This sensor is small and inexpensive, adapted for ambulatory measurements.First, it was necessary to validate the measurements of the kinematic and the kinetic energy using the inertial unit during the sit-to-stand. This validation was realized on a panel of young and healthy subjects compared to a V icon motion captur using cameras.The second objective was to compare different populations through the quantification of the sit-to-stand. In addition of the healthy young subjects, a group of healthy elderly subjects was included in to study the age effect. A group of frail elderly subjects was also included to investigate the effect of frailty. We proposed the implementation of two composite scores based on the measured parameters. The first is an aging score and the second is a frailty score. Each score was constructed using a principal component analysis. The performance of each score is better than that of any parameter considered independently.
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Kevin Lepetit. Évaluation biomécanique des capacités musculo-squelettiques lors de la transition assis / debout au moyen d'une centrale inertielle en situation écologique. Biomécanique [physics.med-ph]. Université de Technologie de Compiègne, 2018. Français. ⟨NNT : 2018COMP2468⟩. ⟨tel-02127839⟩

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