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Oxygen uptake kinetics and energy system’s contribution around maximal lactate steady state swimming intensity
The purpose of this study was to examine the oxygen uptake ([Image: see text] ) kinetics and the energy systems’ contribution at 97.5, 100 and 102.5% of the maximal lactate steady state (MLSS) swimming intensity. Ten elite female swimmers performed three-to-five 30 min submaximal constant swimming b...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5330462/ https://www.ncbi.nlm.nih.gov/pubmed/28245246 http://dx.doi.org/10.1371/journal.pone.0167263 |
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author | Pelarigo, Jailton Gregório Machado, Leandro Fernandes, Ricardo Jorge Greco, Camila Coelho Vilas-Boas, João Paulo |
author_facet | Pelarigo, Jailton Gregório Machado, Leandro Fernandes, Ricardo Jorge Greco, Camila Coelho Vilas-Boas, João Paulo |
author_sort | Pelarigo, Jailton Gregório |
collection | PubMed |
description | The purpose of this study was to examine the oxygen uptake ([Image: see text] ) kinetics and the energy systems’ contribution at 97.5, 100 and 102.5% of the maximal lactate steady state (MLSS) swimming intensity. Ten elite female swimmers performed three-to-five 30 min submaximal constant swimming bouts at imposed paces for the determination of the swimming velocity (v) at 100%MLSS based on a 7 x 200 m intermittent incremental protocol until voluntary exhaustion to find the v associated at the individual anaerobic threshold. [Image: see text] kinetics (cardiodynamic, primary and slow component phases) and the aerobic and anaerobic energy contributions were assessed during the continuous exercises, which the former was studied for the beginning and second phase of exercise. Subjects showed similar time delay (TD) (mean = 11.5–14.3 s) and time constant (τ(p)) (mean = 13.8–16.3 s) as a function of v, but reduced amplitude of the primary component for 97.5% (35.7 ± 7.3 mL.kg.min(-1)) compared to 100 and 102.5%MLSS (41.0 ± 7.0 and 41.3 ± 5.4 mL.kg.min(-1), respectively), and τ(p) decreased (mean = 9.6–10.8 s) during the second phase of exercise. Despite the slow component did not occur for all swimmers at all swim intensities, when observed it tended to increase as a function of v. Moreover, the total energy contribution was almost exclusively aerobic (98–99%) at 97.5, 100 and 102.5%MLSS. We suggest that well-trained endurance swimmers with a fast TD and τ(p) values may be able to adjust faster the physiological requirements to minimize the amplitude of the slow component appearance, parameter associated with the fatigue delay and increase in exhaustion time during performance, however, these fast adjustments were not able to control the progressive fatigue occurred slightly above MLSS, and most of swimmers reached exhaustion before 30min swam. |
format | Online Article Text |
id | pubmed-5330462 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-53304622017-03-09 Oxygen uptake kinetics and energy system’s contribution around maximal lactate steady state swimming intensity Pelarigo, Jailton Gregório Machado, Leandro Fernandes, Ricardo Jorge Greco, Camila Coelho Vilas-Boas, João Paulo PLoS One Research Article The purpose of this study was to examine the oxygen uptake ([Image: see text] ) kinetics and the energy systems’ contribution at 97.5, 100 and 102.5% of the maximal lactate steady state (MLSS) swimming intensity. Ten elite female swimmers performed three-to-five 30 min submaximal constant swimming bouts at imposed paces for the determination of the swimming velocity (v) at 100%MLSS based on a 7 x 200 m intermittent incremental protocol until voluntary exhaustion to find the v associated at the individual anaerobic threshold. [Image: see text] kinetics (cardiodynamic, primary and slow component phases) and the aerobic and anaerobic energy contributions were assessed during the continuous exercises, which the former was studied for the beginning and second phase of exercise. Subjects showed similar time delay (TD) (mean = 11.5–14.3 s) and time constant (τ(p)) (mean = 13.8–16.3 s) as a function of v, but reduced amplitude of the primary component for 97.5% (35.7 ± 7.3 mL.kg.min(-1)) compared to 100 and 102.5%MLSS (41.0 ± 7.0 and 41.3 ± 5.4 mL.kg.min(-1), respectively), and τ(p) decreased (mean = 9.6–10.8 s) during the second phase of exercise. Despite the slow component did not occur for all swimmers at all swim intensities, when observed it tended to increase as a function of v. Moreover, the total energy contribution was almost exclusively aerobic (98–99%) at 97.5, 100 and 102.5%MLSS. We suggest that well-trained endurance swimmers with a fast TD and τ(p) values may be able to adjust faster the physiological requirements to minimize the amplitude of the slow component appearance, parameter associated with the fatigue delay and increase in exhaustion time during performance, however, these fast adjustments were not able to control the progressive fatigue occurred slightly above MLSS, and most of swimmers reached exhaustion before 30min swam. Public Library of Science 2017-02-28 /pmc/articles/PMC5330462/ /pubmed/28245246 http://dx.doi.org/10.1371/journal.pone.0167263 Text en © 2017 Pelarigo et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Pelarigo, Jailton Gregório Machado, Leandro Fernandes, Ricardo Jorge Greco, Camila Coelho Vilas-Boas, João Paulo Oxygen uptake kinetics and energy system’s contribution around maximal lactate steady state swimming intensity |
title | Oxygen uptake kinetics and energy system’s contribution around maximal lactate steady state swimming intensity |
title_full | Oxygen uptake kinetics and energy system’s contribution around maximal lactate steady state swimming intensity |
title_fullStr | Oxygen uptake kinetics and energy system’s contribution around maximal lactate steady state swimming intensity |
title_full_unstemmed | Oxygen uptake kinetics and energy system’s contribution around maximal lactate steady state swimming intensity |
title_short | Oxygen uptake kinetics and energy system’s contribution around maximal lactate steady state swimming intensity |
title_sort | oxygen uptake kinetics and energy system’s contribution around maximal lactate steady state swimming intensity |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5330462/ https://www.ncbi.nlm.nih.gov/pubmed/28245246 http://dx.doi.org/10.1371/journal.pone.0167263 |
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