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- W2079199631 abstract "The study aimed to correlate morphophysiological characteristics associated with performance and indices associated with the critical power model, and to verify the time to exhaustion (Tlim) at critical load (CL) intensity. Twenty male Wistar rats were submitted to four predictive tests to determine CL and anaerobic swim capacity (ASC) intensity using hyperbolic and Busso's models. Subsequently, they were submitted to exercise at 100% of CL intensity derived from hyperbolic model until exhaustion, and the time was recorded to the nearest second. The day after, animals were euthanized for blood and tissue collection. Significant relationships were found among the indices CL, ASC (derived from the both models) and Tlim (P < 0.05). CL derived from hyperbolic model and Tlim were correlated with proportion of oxidative fiber type and proportion of glycolytic fiber type. ASC derived from both models presented weak-to-moderate correlation with proportion of glycolytic fiber type, but it was not significant (P > 0.05). We can conclude that the CL rat swimming model does not properly estimate the anaerobic threshold intensity. Furthermore, the correlations with morphophysiological variables indicate that none of variables alone can account for performance at CL intensity. Les buts de cette étude étaient 1) de corréler des caractéristiques morphophysiologiques associées aux performances physiques aux índices associés tirés du modèle de « puissance critique » et 2) de vérifier les valeurs du temps limite (Tlim) à une puissance correspondant à l’intensité critique (CL). Vingt rats mâles Wistar ont été soumis à quatre tests permettant de déterminer la CL et les capacités anaérobies (ASC) en utilisant les modèles hyperbolique et de Busso. Les rats ont ensuite été soumis à un exercice de nage à intensité critique, maintenu jusqu’à l’épuisement et le temps limite a été enregistré. Le lendemain, les animaux sont euthanasiés et différents tissus prélevés. Différentes corrélations ont été retrouvées, entre l’intensité critique, la capacité anaérobie (évaluations dérivées des modèles utilisés) et le temps limite à la nage (Tlim) (p < 0,05). CL et Tlim sont corrélées à la proportion de fibres oxydatives. ASC estimé à partir des deux modèles utilisés ne présente qu’une faible corrélation avec la proportion de fibres glycolytiques (corrélation non significative p > 0,05). Nous pouvons conclure que le modèle de CL chez le rat ne permet pas d’estimer l’intensité au seuil anaérobie. Par ailleurs, les analyses de corrélations permettent de conclure qu’aucune des variables étudiées ne permet à elle seule de rendre compte des performances à l’intensité critique." @default.
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- W2079199631 date "2013-06-01" @default.
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- W2079199631 title "Critical load forced-swim test with Wistar rats does not properly estimate anaerobic threshold: The relationship with morphophysiological factors and performance indices" @default.
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- W2079199631 doi "https://doi.org/10.1016/j.scispo.2012.08.002" @default.
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