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Exercice, veines et maladie veineuse chronique : effets de l'exercice et des conditions de récupération

Abstract : The role of the venous system is central to cardiovascular fonction, yet, in terms of scientific literature, it appears to be the "poor relation" compared to the heart or arterial system. This is true both for the physiological understanding of venous hemodynamics and for the pathophysiological analysis of chronic venous disease and more particularly when the link is made with exercise. The aim of our investigations was to better understand the adaptations of the venous system during physical activity and during the post-exercise recovery period and, to evaluate the impact of chronic venous disease on physical activity and vice versa. We have studied the acute effects of physical activity on venous hemodynamics (evaluation of the calf venous pump), and the effects of various recovery methods ( compression, immersion, calf low frequency electrical stimulation), and we have also explored the consequences of chronic venous disease upon physical activity through the analysis of venous claudication. The main results of our work enabled a better understanding of the adjustments in venous hemodynamics linked to exercise in healthy subjects and to better understand the pathophysiological consequences of high venous pressure on the microcirculation of patients with chronic venous disease. Our findings also provide a detailed understanding of venous hemodynamics during post-exercise recovery and the positive effects of recovery methods on both performance and vascular adjustments. The interdependence of the different organs and tissues (heart, arteries, microcirculation, veins) of the cardiovascular system is an essential element highlighted in this work. Thus, we demonstrated that venous hemodynamics could not be analyzed in isolation, but rather that it should be assessed as a whole by measuring implications on cardiac filling and on tissue exchange, and looking for the part of the splanchnic system and limbs system on systemic venous return. ln conclusion, we have filled some of the gaps in the literature by examining the relationships between veins, physical exercise, recovery and venous pathology. However, questions remain regarding the methodology to be implemented for the evaluation of the venous system and the chronic effects of the intensive physical activity practice on the chronic venous disease prevalence
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Samuel Beliard. Exercice, veines et maladie veineuse chronique : effets de l'exercice et des conditions de récupération. Médecine humaine et pathologie. Université Bourgogne Franche-Comté, 2017. Français. ⟨NNT : 2017UBFCE009⟩. ⟨tel-02401441⟩

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