Oxygen uptake kinetics during supra-maximal exercise: Mathematical modelling

Detalhes bibliográficos
Autor(a) principal: Hirai, Daniel Müller
Data de Publicação: 2008
Outros Autores: Okuno, Nilo Massaru, Perandini, Luiz Augusto Buoro, Puga, Guilherme Morais, Simões, Herbert Gustavo, Nakamura, Fábio Yuzo
Tipo de documento: Artigo
Idioma: por
Título da fonte: Revista Brasileira de Cineantropometria & Desempenho Humano (Online)
Texto Completo: https://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2008v10n1p43
Resumo: Precise estimation of oxygen uptake kinetics parameters is essential to understand its control and/or limit uptake mechanisms. The purpose of the present study was to characterize the oxygen uptake kinetics responses during supramaximal cycle ergometer exercise using two modeling techniques. Eleven male subjects (age = 25.4 ± 4.9 years, height = 177.0 ± 4.0 cm, mass = 77.1 ± 11.3 kg, VO2max = 40.3 ± 6.3 mL.kg-1.min-1) performed a series of square- have exercise transitions to exhaustion at intensities equivalent to 100, 113, 133 and 153% of VO2max. The time constant of the primary component was estimated with an exponential and semi-logarithmic model, comparisons were made using repeated measures ANOVA and the Tukey post hoc tests, with statistical signifi cance accepted when p<0.05. In order to calculate the time constant by the semi-logarithmic model it is necessary to estimate oxygen demand, which was performed by means of a regression procedure. The exponential model resulted in lower values for the time constant (35.1 ± 8.0s; 32.5 ± 7.4s; 29.6 ± 11.3s; 25.3 ± 7.5s) compared to the semi-logarithmic model (107.9 ± 27.1s; 104.5 ± 24.3s; 114.1 ± 30.4s; 125.3 ± 24.9s) at all intensities. The observation of this confl icting oxygen uptake kinetics behavior depending upon which mathematical model is applied suggests that physiological inferences on the basis of parameters obtained during supra-maximal exercise should be made with caution.
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spelling Oxygen uptake kinetics during supra-maximal exercise: Mathematical modellingCinética do consumo de oxigênio durante exercícios supramáximos: Aplicação de modelos matemáticosPrecise estimation of oxygen uptake kinetics parameters is essential to understand its control and/or limit uptake mechanisms. The purpose of the present study was to characterize the oxygen uptake kinetics responses during supramaximal cycle ergometer exercise using two modeling techniques. Eleven male subjects (age = 25.4 ± 4.9 years, height = 177.0 ± 4.0 cm, mass = 77.1 ± 11.3 kg, VO2max = 40.3 ± 6.3 mL.kg-1.min-1) performed a series of square- have exercise transitions to exhaustion at intensities equivalent to 100, 113, 133 and 153% of VO2max. The time constant of the primary component was estimated with an exponential and semi-logarithmic model, comparisons were made using repeated measures ANOVA and the Tukey post hoc tests, with statistical signifi cance accepted when p<0.05. In order to calculate the time constant by the semi-logarithmic model it is necessary to estimate oxygen demand, which was performed by means of a regression procedure. The exponential model resulted in lower values for the time constant (35.1 ± 8.0s; 32.5 ± 7.4s; 29.6 ± 11.3s; 25.3 ± 7.5s) compared to the semi-logarithmic model (107.9 ± 27.1s; 104.5 ± 24.3s; 114.1 ± 30.4s; 125.3 ± 24.9s) at all intensities. The observation of this confl icting oxygen uptake kinetics behavior depending upon which mathematical model is applied suggests that physiological inferences on the basis of parameters obtained during supra-maximal exercise should be made with caution.A correta estimativa dos parâmetros da cinética do consumo de oxigênio é fundamental para a interpretação de seus mecanismos de controle e/ou limitação. O objetivo deste estudo foi caracterizar a cinética do consumo de oxigênio em intensidades supra-máximas realizadas em cicloergômetro a partir da utilização de dois modelos matemáticos distintos. Onze indivíduos saudáveis do sexo masculino (idade = 25,4 ± 4,9 anos, estatura = 177,0 ± 4,0 cm, massa corporal = 77,1 ± 11,3 kg, VO2max = 40,3 ± 6,3 mL.kg-1.min-1) realizaram quatro testes retangulares exaustivos de intensidades correspondentes a 100, 113, 133 e 153%VO2max. As constantes de tempo do componente primário da cinética do VO2 foram estimadas a partir dos modelos exponencial e semi-logarítmico e comparadas através de ANOVA para medidas repetidas e post hoc de Tukey, admitindo-se PUniversidade Federal de Santa Catarina. Florianópolis, SC. Brasil2008-07-18info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion"Avaliado por Pares",Avaliado por ParesDescritivaapplication/pdfapplication/pdfhttps://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2008v10n1p4310.1590/1980-0037.2008v10n1p43Brazilian Journal of Kinanthropometry and Human Performance; Vol. 10 No. 1 (2008); 43-49Revista Brasileira de Cineantropometria e Desempenho Humano; v. 10 n. 1 (2008); 43-491980-00371415-8426reponame:Revista Brasileira de Cineantropometria & Desempenho Humano (Online)instname:Universidade Federal de Santa Catarina (UFSC)instacron:UFSCporhttps://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2008v10n1p43/3487https://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2008v10n1p43/16600Hirai, Daniel MüllerOkuno, Nilo MassaruPerandini, Luiz Augusto BuoroPuga, Guilherme MoraisSimões, Herbert GustavoNakamura, Fábio Yuzoinfo:eu-repo/semantics/openAccess2022-11-21T14:13:44Zoai:periodicos.ufsc.br:article/4138Revistahttps://periodicos.ufsc.br/index.php/rbcdh/PUBhttps://periodicos.ufsc.br/index.php/rbcdh/oairbcdh@contato.ufsc.br || portaldeperiodicos.bu@contato.ufsc.br1980-00371415-8426opendoar:2022-11-21T14:13:44Revista Brasileira de Cineantropometria & Desempenho Humano (Online) - Universidade Federal de Santa Catarina (UFSC)false
dc.title.none.fl_str_mv Oxygen uptake kinetics during supra-maximal exercise: Mathematical modelling
Cinética do consumo de oxigênio durante exercícios supramáximos: Aplicação de modelos matemáticos
title Oxygen uptake kinetics during supra-maximal exercise: Mathematical modelling
spellingShingle Oxygen uptake kinetics during supra-maximal exercise: Mathematical modelling
Hirai, Daniel Müller
title_short Oxygen uptake kinetics during supra-maximal exercise: Mathematical modelling
title_full Oxygen uptake kinetics during supra-maximal exercise: Mathematical modelling
title_fullStr Oxygen uptake kinetics during supra-maximal exercise: Mathematical modelling
title_full_unstemmed Oxygen uptake kinetics during supra-maximal exercise: Mathematical modelling
title_sort Oxygen uptake kinetics during supra-maximal exercise: Mathematical modelling
author Hirai, Daniel Müller
author_facet Hirai, Daniel Müller
Okuno, Nilo Massaru
Perandini, Luiz Augusto Buoro
Puga, Guilherme Morais
Simões, Herbert Gustavo
Nakamura, Fábio Yuzo
author_role author
author2 Okuno, Nilo Massaru
Perandini, Luiz Augusto Buoro
Puga, Guilherme Morais
Simões, Herbert Gustavo
Nakamura, Fábio Yuzo
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Hirai, Daniel Müller
Okuno, Nilo Massaru
Perandini, Luiz Augusto Buoro
Puga, Guilherme Morais
Simões, Herbert Gustavo
Nakamura, Fábio Yuzo
description Precise estimation of oxygen uptake kinetics parameters is essential to understand its control and/or limit uptake mechanisms. The purpose of the present study was to characterize the oxygen uptake kinetics responses during supramaximal cycle ergometer exercise using two modeling techniques. Eleven male subjects (age = 25.4 ± 4.9 years, height = 177.0 ± 4.0 cm, mass = 77.1 ± 11.3 kg, VO2max = 40.3 ± 6.3 mL.kg-1.min-1) performed a series of square- have exercise transitions to exhaustion at intensities equivalent to 100, 113, 133 and 153% of VO2max. The time constant of the primary component was estimated with an exponential and semi-logarithmic model, comparisons were made using repeated measures ANOVA and the Tukey post hoc tests, with statistical signifi cance accepted when p<0.05. In order to calculate the time constant by the semi-logarithmic model it is necessary to estimate oxygen demand, which was performed by means of a regression procedure. The exponential model resulted in lower values for the time constant (35.1 ± 8.0s; 32.5 ± 7.4s; 29.6 ± 11.3s; 25.3 ± 7.5s) compared to the semi-logarithmic model (107.9 ± 27.1s; 104.5 ± 24.3s; 114.1 ± 30.4s; 125.3 ± 24.9s) at all intensities. The observation of this confl icting oxygen uptake kinetics behavior depending upon which mathematical model is applied suggests that physiological inferences on the basis of parameters obtained during supra-maximal exercise should be made with caution.
publishDate 2008
dc.date.none.fl_str_mv 2008-07-18
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dc.relation.none.fl_str_mv https://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2008v10n1p43/3487
https://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2008v10n1p43/16600
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dc.publisher.none.fl_str_mv Universidade Federal de Santa Catarina. Florianópolis, SC. Brasil
publisher.none.fl_str_mv Universidade Federal de Santa Catarina. Florianópolis, SC. Brasil
dc.source.none.fl_str_mv Brazilian Journal of Kinanthropometry and Human Performance; Vol. 10 No. 1 (2008); 43-49
Revista Brasileira de Cineantropometria e Desempenho Humano; v. 10 n. 1 (2008); 43-49
1980-0037
1415-8426
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instname_str Universidade Federal de Santa Catarina (UFSC)
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reponame_str Revista Brasileira de Cineantropometria & Desempenho Humano (Online)
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