The influence of stroke mechanics into energy cost of elite swimmers.

European Journal of Applied Physiology
Tiago M BarbosaJ P Vilas-Boas

Abstract

The purpose of this study was to analyze the relationships between energy cost (C), swimming velocity (v), stroke frequency (SF) and stroke length (SL) in top-level swimmers. Eighteen elite swimmers (four freestylers, five backstrokers, five breaststrokers and four butterflyers) performed an intermittent set of nx200 m swims (n<or=8) with increasing velocity. The oxygen consumption was measured breath-by-breath by a portable metabolic cart (K4 b2, Cosmed, Rome, Italy). A respiratory snorkel and valve system with low hydrodynamic resistance was used to measure pulmonary ventilation and collect expiratory gases. Blood samples were taken from the ear lobe before and after each swim to analyze the blood lactate concentration (YSI 1500L, Yellow Springs, OH, USA). At Backstroke, Breaststroke and Butterfly strokes, increases of SF were associated to increases of C, even when controlling the v. The increases in SL only promoted significant decreases in the C in Breaststroke. There was a significant and polynomial relationship between v and SF for all competitive swimming techniques. The polynomial relationship between v and SL was significant only in Freestyle and Butterfly stroke. Partial correlations between v and SF controlling the ...Continue Reading

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Citations

Nov 20, 2008·European Journal of Applied Physiology·Sébastien Ratel, Bastien Poujade
Apr 10, 2010·European Journal of Applied Physiology·Tiago BarbosaVictor Machado Reis
Apr 8, 2010·European Journal of Applied Physiology·Victor Machado ReisAntónio José Silva
Oct 28, 2010·European Journal of Applied Physiology·Pedro FigueiredoRicardo J Fernandes
Mar 22, 2013·European Journal of Applied Physiology·Pedro FigueiredoRicardo J Fernandes
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Jul 24, 2014·International Journal of Sports Physiology and Performance·Tiago M BarbosaRicardo J Fernandes
Dec 7, 2019·European Journal of Applied Physiology·Paola ZamparoGiorgio Gatta
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Nov 23, 2016·European Journal of Sport Science·Vicente Javier Clemente-SuárezJ Paulo Vilas-Boas
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Mar 27, 2020·International Journal of Environmental Research and Public Health·Mário J CostaTiago M Barbosa

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