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Master Thesis

L’adaptation physiologique et nutritionnelle du coureur du grand raid, ultra-trail à l'Île de la Réunion

Abstract : The GrandÎ Raid is a 165-kilometer ultra-trail that takes place on Reunion Island. Ultra-trail, or ultra-endurance sport have been expanding for about ten years and the preparation for this type of test is very specific. Athletes must have an impeccable lifestyle during the preparation and recovery in order to perform during the event and avoid injury during the training period or the event itself. The human body will adapt according to the training and the nutritional regime adopted by the rider during the period preceding the race. The adaptations will vary from one rider to another depending on individual characteristics. At the physiological level, the cardiac, pulmonary and muscular functions will be particularly modified thanks to the training so that the runner becomes more and more enduring. The energy needed by the athlete comes from lipids, carbohydrates and proteins and the entire production chain will take place in the mitochondria. On the other hand in endurance, and especially in ultra-endurance, the goal of the runner will be to use the maximum lipids as a source of energy in order to keep his stock of glycogen to last in the event. Training will engender this adaptation and will allow the athlete to draw more and more in its reserves of fat and to save its glycogen. We can see a shift to the right of the "Crossover point" on the curve that links the use of lipids and carbohydrates to exercise as a function of VO2 max. The VO2 max is the maximum amount of oxygen that an individual can use per unit of time. A specific diet adapted to each runner is necessary in order to fill the deficits of each in micronutrients and to give the right rations of macronutrients to optimize the setting aside and then the production of energy during the test. The glycogen stores can be increased following a diet low in glucose and then enriched in glucose that will take place a few days before the race. The athlete will have to find the appropriate diet during his training period, then apply it during the event to optimize his performance and avoid injuries.
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Master Thesis
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Submitted on : Wednesday, October 23, 2019 - 1:34:19 PM
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Olivia Gautier. L’adaptation physiologique et nutritionnelle du coureur du grand raid, ultra-trail à l'Île de la Réunion. Sciences du Vivant [q-bio]. 2019. ⟨dumas-02328926⟩



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