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Compréhension du phénomène de surmenage fonctionnel induit par le travail en endurance : implications pour l’entraînement et la performance

Abstract : The purpose of this work is to examine whether performance supercompensation during taper is maximized in endurance athletes after experiencing overreaching during an overload training period. This first study showed that 1) greater gains in performance and V˙O2max can be achieved when higher training load is prescribed before the taper but not in the presence of functional overreaching (F-OR); 2) peak performance is not delayed during taper when heavy training loads are completed immediately prior; and 3) F-OR provides higher risk for training maladaptation, including increased infection risks. The second study confirms sleep disturbances and increased illness in endurance athletes who present with symptoms of F-OR during periods of high volume training. The third study shows a lower cardiac output and systolic blood pressure with greater arteriovenous O2 difference were reported in F-OR subjects at all exercising intensities, while no significant change was observed in the control and acute fatigue (AF) groups. A concomitant decrease in epinephrine excretion was reported only in the F-OR group. All values returned to baseline at Post. Following an overload endurance training program leading to F-OR, the cardiac response to exhaustive exercise is transiently impaired, possibly due to reduced epinephrine excretion. This finding is likely to explain the complex process of underperformance syndrome experienced by F-OR endurance athletes during heavy load programs
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https://tel.archives-ouvertes.fr/tel-01474359
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Submitted on : Wednesday, February 22, 2017 - 4:57:41 PM
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Anaël Aubry. Compréhension du phénomène de surmenage fonctionnel induit par le travail en endurance : implications pour l’entraînement et la performance. Médecine humaine et pathologie. COMUE Université Côte d'Azur (2015 - 2019), 2016. Français. ⟨NNT : 2016AZUR4104⟩. ⟨tel-01474359⟩

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