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Sex and Exercise Intensity Do Not Influence Oxygen Uptake Kinetics in Submaximal Swimming

The aim of this study was to compare the oxygen uptake ([Formula: see text]) kinetics in front crawl between male and female swimmers at moderate and heavy intensity. We hypothesized that the time constant for the primary phase [Formula: see text] kinetics was faster in men than in women, for both i...

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Autores principales: Reis, Joana F., Millet, Gregoire P., Bruno, Paula M., Vleck, Veronica, Alves, Francisco B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5301027/
https://www.ncbi.nlm.nih.gov/pubmed/28239356
http://dx.doi.org/10.3389/fphys.2017.00072
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author Reis, Joana F.
Millet, Gregoire P.
Bruno, Paula M.
Vleck, Veronica
Alves, Francisco B.
author_facet Reis, Joana F.
Millet, Gregoire P.
Bruno, Paula M.
Vleck, Veronica
Alves, Francisco B.
author_sort Reis, Joana F.
collection PubMed
description The aim of this study was to compare the oxygen uptake ([Formula: see text]) kinetics in front crawl between male and female swimmers at moderate and heavy intensity. We hypothesized that the time constant for the primary phase [Formula: see text] kinetics was faster in men than in women, for both intensities. Nineteen well trained swimmers (8 females mean ± SD; age 17.9 ± 3.5 years; mass 55.2 ± 3.6 kg; height 1.66 ± 0.05 m and 11 male 21.9 ± 2.8 years; 78.2 ± 11.1 kg; 1.81 ± 0.08 m) performed a discontinuous maximal incremental test and two 600-m square wave transitions for both moderate and heavy intensities to determine the [Formula: see text] kinetics parameters using mono- and bi-exponential models, respectively. All the tests involved breath-by-breath analysis of front crawl swimming using a swimming snorkel. The maximal oxygen uptake [Formula: see text] was higher in men than in women [4,492 ± 585 ml·min(−1) and 57.7 ± 4.4 ml·kg(−1)·min(−1) vs. 2,752.4 ± 187.9 ml·min(−1) (p ≤ 0.001) and 50.0 ± 5.7 ml·kg(−1)·min(−1)(p = 0.007), respectively]. Similarly, the absolute amplitude of the primary component was higher in men for both intensities (moderate: 1,736 ± 164 vs. 1,121 ± 149 ml·min(−1); heavy: 2,948 ± 227 vs. 1,927 ± 243 ml·min(−1), p ≤ 0.001, for males and females, respectively). However, the time constant of the primary component (τ(p)) was not influenced by sex (p = 0.527) or swimming intensity (p = 0.804) (moderate: 15.1 ± 5.6 vs. 14.4 ± 5.1 s; heavy: 13.5 ± 3.3 vs. 16.0 ± 4.5 s, for females and males, respectively). The slow component in the heavy domain was not significantly different between female and male swimmers (3.2 ± 2.4 vs. 3.8 ± 1.0 ml·kg(−1)·min(−1), p = 0.476). Overall, only the absolute amplitude of the primary component was higher in men, while the other [Formula: see text] kinetics parameters were similar between female and male swimmers at both moderate and heavy intensities. The mechanisms underlying these similarities remain unclear.
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spelling pubmed-53010272017-02-24 Sex and Exercise Intensity Do Not Influence Oxygen Uptake Kinetics in Submaximal Swimming Reis, Joana F. Millet, Gregoire P. Bruno, Paula M. Vleck, Veronica Alves, Francisco B. Front Physiol Physiology The aim of this study was to compare the oxygen uptake ([Formula: see text]) kinetics in front crawl between male and female swimmers at moderate and heavy intensity. We hypothesized that the time constant for the primary phase [Formula: see text] kinetics was faster in men than in women, for both intensities. Nineteen well trained swimmers (8 females mean ± SD; age 17.9 ± 3.5 years; mass 55.2 ± 3.6 kg; height 1.66 ± 0.05 m and 11 male 21.9 ± 2.8 years; 78.2 ± 11.1 kg; 1.81 ± 0.08 m) performed a discontinuous maximal incremental test and two 600-m square wave transitions for both moderate and heavy intensities to determine the [Formula: see text] kinetics parameters using mono- and bi-exponential models, respectively. All the tests involved breath-by-breath analysis of front crawl swimming using a swimming snorkel. The maximal oxygen uptake [Formula: see text] was higher in men than in women [4,492 ± 585 ml·min(−1) and 57.7 ± 4.4 ml·kg(−1)·min(−1) vs. 2,752.4 ± 187.9 ml·min(−1) (p ≤ 0.001) and 50.0 ± 5.7 ml·kg(−1)·min(−1)(p = 0.007), respectively]. Similarly, the absolute amplitude of the primary component was higher in men for both intensities (moderate: 1,736 ± 164 vs. 1,121 ± 149 ml·min(−1); heavy: 2,948 ± 227 vs. 1,927 ± 243 ml·min(−1), p ≤ 0.001, for males and females, respectively). However, the time constant of the primary component (τ(p)) was not influenced by sex (p = 0.527) or swimming intensity (p = 0.804) (moderate: 15.1 ± 5.6 vs. 14.4 ± 5.1 s; heavy: 13.5 ± 3.3 vs. 16.0 ± 4.5 s, for females and males, respectively). The slow component in the heavy domain was not significantly different between female and male swimmers (3.2 ± 2.4 vs. 3.8 ± 1.0 ml·kg(−1)·min(−1), p = 0.476). Overall, only the absolute amplitude of the primary component was higher in men, while the other [Formula: see text] kinetics parameters were similar between female and male swimmers at both moderate and heavy intensities. The mechanisms underlying these similarities remain unclear. Frontiers Media S.A. 2017-02-10 /pmc/articles/PMC5301027/ /pubmed/28239356 http://dx.doi.org/10.3389/fphys.2017.00072 Text en Copyright © 2017 Reis, Millet, Bruno, Vleck and Alves. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Physiology
Reis, Joana F.
Millet, Gregoire P.
Bruno, Paula M.
Vleck, Veronica
Alves, Francisco B.
Sex and Exercise Intensity Do Not Influence Oxygen Uptake Kinetics in Submaximal Swimming
title Sex and Exercise Intensity Do Not Influence Oxygen Uptake Kinetics in Submaximal Swimming
title_full Sex and Exercise Intensity Do Not Influence Oxygen Uptake Kinetics in Submaximal Swimming
title_fullStr Sex and Exercise Intensity Do Not Influence Oxygen Uptake Kinetics in Submaximal Swimming
title_full_unstemmed Sex and Exercise Intensity Do Not Influence Oxygen Uptake Kinetics in Submaximal Swimming
title_short Sex and Exercise Intensity Do Not Influence Oxygen Uptake Kinetics in Submaximal Swimming
title_sort sex and exercise intensity do not influence oxygen uptake kinetics in submaximal swimming
topic Physiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5301027/
https://www.ncbi.nlm.nih.gov/pubmed/28239356
http://dx.doi.org/10.3389/fphys.2017.00072
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