Browsing by Author "Marinho, D. A."
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- Effects of Swim Training on Energetics and PerformancePublication . Costa, M. J.; Bragada, J. A.; Mejias, J. E.; Louro, Hugo; Marinho, D. A.; Silva, A. J.; Barbosa, T.M.The aim of this study was to determine the effect of several months of training on performance and energetic profile of elite swimmers. 9 elite swimmers were evaluated at 3 different time periods during the 2010-2011 calendar. Swimming performance was assessed based on lists of times for the 200 m freestyle event. An incremental set of 7×200 m swims was applied to obtain the energetic data. Measurements and/or estimations were made for the: velocity at 4 mmol l - 1 of lactate concentrations, highest value of lactate concentrations, maximal oxygen consumption, minimum swimming velocity where the maximal oxygen consumption is reached and total energy expenditure (Etot). The performance and most of the energetic variables assessed presented no significant variations during the study period. The only exception was the Etot with significant differences between all measurements. Correlation coefficients suggested a high stability for all variables. Cohen's Kappa tracking index demonstrated high variability in the individual adaptations to training. It is concluded that elite swimmers demonstrate a slight improvement in performance and energetic profile in response to several months of training. Each subject has an individual way of adapting to the training load, combining the different energetic confounders to enhance performance
- Sex differences in relationships between perceived coach-induced motivational climates, basic psychological needs, and behavior regulation among young swimmersPublication . Rodrigues, Filipe; Macedo, R.; Cid, Luis; Teixeira, D. S.; Marinho, D. A.; Monteiro, DiogoThis study analyzed independent and codependent effects of task- and ego-involving motivational climates on basic psychological need satisfaction and behavioral regulation (i.e., autonomous and controlled motivation) among young athletes. Participants were young Portuguese female (n = 114) and male (n = 324) swimmers, nested within four different clubs. Participants completed a multisection survey, assessing motivational climates, basic psychological needs satisfaction, and behavioral regulation. We used polynomial regression analysis with surface response methodology to analyze the interactions between these constructs. We found that perceived task- and ego-involving motivational climates were not mutually exclusive; rather, their relationship depended on how athletes perceived coaches' behaviors and how coaches emphasized one or both climates. Coaches who fostered both motivational climates promoted positive outcomes among male (but not female) athletes.