Author(s):
Almeida, Tiago A. F. [UNESP] ; Pessôa Filho, Dalton M. [UNESP] ; Espada, Mário A. C. ; Reis, Joana F. ; Simionato, Astor R. [UNESP] ; Siqueira, Leandro O. C. [UNESP] ; Alves, Francisco B.
Date: 2020
Persistent ID: http://hdl.handle.net/11449/200204
Origin: Oasisbr
Subject(s): Energy system contribution; Maximal trials; Oxygen uptake kinetics; Rate of adjustment of V˙ O 2; Swimming; Energy system contribution; Energy system contribution; Maximal trials; Maximal trials; Oxygen uptake kinetics; Oxygen uptake kinetics; Rate of adjustment of V˙ O 2; Rate of adjustment of V˙ O 2; Swimming; Swimming
Description
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Fundação para a Ciência e a Tecnologia
Purpose: This study aims to analyze swimmers’ oxygen uptake kinetics (V˙ O 2K) and bioenergetic profiles in 50, 100, and 200 m simulated swimming events and determine which physiological variables relate with performance. Methods: Twenty-eight well-trained swimmers completed an incremental test for maximal oxygen uptake (Peak-V˙ O 2) and maximal aerobic velocity (MAV) assessment. Maximal trials (MT) of 50, 100, and 200-m in front crawl swimming were performed for V˙ O 2K and bioenergetic profile. V˙ O 2K parameters were calculated through monoexponential modeling and by a new growth rate method. The recovery phase was used along with the blood lactate concentration for bioenergetics profiling. Results: Peak-V˙ O 2 (57.47 ± 5.7 ml kg−1 min−1 for male and 53.53 ± 4.21 ml kg−1 min−1 for female) did not differ from V˙ O 2 peak attained at the 200-MT for female and at the 100 and 200-MT for male. From the 50-MT to 100-MT and to the 200-MT the V˙ O 2K presented slower time constants (8.6 ± 2.3 s, 11.5 ± 2.4 s and 16.7 ± 5.5 s, respectively), the aerobic contribution increased (~ 34%, 54% and 71%, respectively) and the anaerobic decreased (~ 66%, 46% and 29%, respectively), presenting a cross-over in the 100-MT. Both energy systems, MAV, Peak-V˙ O 2, and V˙ O 2 peak of the MT’s were correlated with swimming performance. Discussion: The aerobic energy contribution is an important factor for performance in 50, 100, and 200-m, regardless of the time taken to adjust the absolute oxidative response, when considering the effect on a mixed-group regarding sex. V˙ O 2K speeding could be explained by a faster initial pacing strategy used in the shorter distances, that contributed for a more rapid increase of the oxidative contribution to the energy turnover.
CIPER Faculdade de Motricidade Humana Universidade de Lisboa
Laboratory of Physiology and Biochemistry of Exercise Faculdade de Motricidade Humana Universidade de Lisboa
Department of Physical Education São Paulo State University (UNESP) at Bauru
Department of Science and Technology School of Education Polytechnic Institute of Setúbal
Life Quality Research Centre Polytechnic Institute of Santarém
Universidade Europeia
Department of Physical Education São Paulo State University (UNESP) at Bauru
Fundação para a Ciência e a Tecnologia: SFRH/BD/73022/2010
