Lactate accumulation in response to supramaximal exercise in rowers

Autor: Maciejewski, Hugo, BOURDIN, Muriel, LACOUR, Jean-René, DENIS, Christian, MOYEN, Bernard, Messonnier, Laurent
Přispěvatelé: Laboratoire de Biomécanique et Mécanique des Chocs (LBMC UMR T9406), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR), Laboratoire Interuniversitaire de Biologie de la Motricité (LIBM ), Université de Lyon-Université de Lyon-Université Jean Monnet [Saint-Étienne] (UJM)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])
Jazyk: angličtina
Rok vydání: 2013
Předmět:
Zdroj: Scandinavian Journal of Medicine and Science in Sports
Scandinavian Journal of Medicine and Science in Sports, Wiley, 2013, 23 (5), pp. 585-592. ⟨10.1111/j.1600-0838.2011.01423.x⟩
ISSN: 0905-7188
1600-0838
DOI: 10.1111/j.1600-0838.2011.01423.x⟩
Popis: The aim of this study was to test i) three methods to estimate the Quantity of Lactate Accumulated (QLaA) in response to supramaximal exercise and ii) correlations between QLaA and the non-oxidative energy supply assessed by the Accumulated Oxygen Deficit (AOD). Nine rowers performed a 3-min all-out test on a rowing ergometer to estimate AOD and lactate accumulation in response to exercise. Peak blood lactate concentration ([La]peak) during recovery was assessed, allowing QLaA(m1) to be estimated by the method of Margaria et al. Application of a bicompartmental model of lactate distribution space to the blood lactate recovery curves allowed estimation of i) the Net Amount of Lactate Released during recovery from the active muscles (NALRmax), and ii) QLaA according to two methods (QLaA(m2) and QLaA(m3)). [La]peak did not correlate with AOD. QLaA(m1), QLaA(m2) and QLaA(m3) correlated with AOD (r = 0.70, r = 0.85 and r = 0.92, respectively). These results confirm that [La]peak does not provide reliable information on non-oxidative energy supply during supramaximal exercise. The correlations between AOD and QLaA(m2) and QLaA(m3) support the concept of studying blood lactate recovery curves to estimate lactate accumulation and thus the contribution of non-oxidative pathway to energy supply during supramaximal exercise.
Databáze: OpenAIRE
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