Differences among variables of determination of vantilatory thresholds
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , |
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/3793 |
Resumo: | The objective of this study was to investigate the association and sensibility of variables that identify VT1 and VT2, employing the usage of both visual and mathematical methods. Twenty men underwent a progressive test on treadmill with initial velocity between 4 and 6 km.h-1, and increments of 1 km.h-1 per minute. The visual curve analyses of VE, VE/VO2, VE/VCO2, FeO2, FeCO2 and R were applied to VT1 and VT2 identification. The Vslope and multiple linear regressions mathematically determinated VT1 and VT2, respectively. In VT1, VE/VO2 was significantly higher than VE and V-slope methods, whereas in VT2 no significant differences were recognized. In VT1, no significant correlation was identified, despite the higher level of sensibility (75%-95%); In VT2, VE and FeCO2 demonstrated significant correlation coefficient (r= -0.71; p < 0.05) but only FeCO2 and VE/VCO2 demonstrated satisfactory level of sensibility (75% and 80% of individuals, respectively). The V-slope method and multiple linear regressions also demonstrated satisfactory levels of sensibility (75% and 90%, respectively). We concluded that different ventilatory variables may not determine the same points, suggesting dissociation among them and either may not show the same sensibility level. |
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Differences among variables of determination of vantilatory thresholdsDiferenças entre variáveis de identificação dos limiares ventilatóriosThe objective of this study was to investigate the association and sensibility of variables that identify VT1 and VT2, employing the usage of both visual and mathematical methods. Twenty men underwent a progressive test on treadmill with initial velocity between 4 and 6 km.h-1, and increments of 1 km.h-1 per minute. The visual curve analyses of VE, VE/VO2, VE/VCO2, FeO2, FeCO2 and R were applied to VT1 and VT2 identification. The Vslope and multiple linear regressions mathematically determinated VT1 and VT2, respectively. In VT1, VE/VO2 was significantly higher than VE and V-slope methods, whereas in VT2 no significant differences were recognized. In VT1, no significant correlation was identified, despite the higher level of sensibility (75%-95%); In VT2, VE and FeCO2 demonstrated significant correlation coefficient (r= -0.71; p < 0.05) but only FeCO2 and VE/VCO2 demonstrated satisfactory level of sensibility (75% and 80% of individuals, respectively). The V-slope method and multiple linear regressions also demonstrated satisfactory levels of sensibility (75% and 90%, respectively). We concluded that different ventilatory variables may not determine the same points, suggesting dissociation among them and either may not show the same sensibility level.O objetivo deste estudo foi verificar a associação e sensibilidade das variáveis que identificam LV1 e LV2, utilizando método de análise visual e matemática. Vinte homens executaram teste em esteira rolante, com velocidade inicial entre 4 e 6 km.h-1, e incrementos de 1 km.h-1 a cada minuto. A análise visual das curvas da VE, VE/VO2, VE/VCO2, FeO2, FeCO2 e R foram utilizadas na identificação de LV1 e LV2. Os modelos V-slope e regressão linear múltipla determinaram matematicamente LV1 e LV2, respectivamente. No LV1, VE/VO2 foi significativamente maior do que VE e V-slope, enquanto para LV2, não houve diferenças significativas entre as variáveis de identificação. Em LV1 não foram identificadas correlações significativas entre as variáveis, embora com um bom nível de sensibilidade (75%-95%); em LV2, VE e FeCO2 apresentaram correlação significativa (r= - 0,71; p < 0,05), mas apenas a FeCO2 e VE/VCO2 apresentaram nível de sensibilidade satisfatório (75% e 80% dos indivíduos, respectivamente). O método V-slope e regressão linear múltipla também apresentaram nível de sensibilidade satisfatório (75% e 90%, respectivamente). Nós concluímos que as diferentes variáveis ventilatórias podem não determinar os mesmos pontos, sugerindo dissociação entre elas, e não apresentar o mesmo nível de sensibilidade.Universidade Federal de Santa Catarina. Florianópolis, SC. Brasil2005-06-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion"Avaliado por Pares",Avaliado por ParesDescritivaapplication/pdfapplication/pdfhttps://periodicos.ufsc.br/index.php/rbcdh/article/view/379310.1590/%xBrazilian Journal of Kinanthropometry and Human Performance; Vol. 7 No. 2 (2005); 20-28Revista Brasileira de Cineantropometria e Desempenho Humano; v. 7 n. 2 (2005); 20-281980-00371415-8426reponame:Revista Brasileira de Cineantropometria & Desempenho Humano (Online)instname:Universidade Federal de Santa Catarina (UFSC)instacron:UFSCporhttps://periodicos.ufsc.br/index.php/rbcdh/article/view/3793/3236https://periodicos.ufsc.br/index.php/rbcdh/article/view/3793/16767Pires, Flávio de OliveiraLima-Silva, Adriano EduardoOliveira, Fernando Roberto deinfo:eu-repo/semantics/openAccess2018-09-12T10:53:19Zoai:periodicos.ufsc.br:article/3793Revistahttps://periodicos.ufsc.br/index.php/rbcdh/PUBhttps://periodicos.ufsc.br/index.php/rbcdh/oairbcdh@contato.ufsc.br || portaldeperiodicos.bu@contato.ufsc.br1980-00371415-8426opendoar:2018-09-12T10:53:19Revista Brasileira de Cineantropometria & Desempenho Humano (Online) - Universidade Federal de Santa Catarina (UFSC)false |
dc.title.none.fl_str_mv |
Differences among variables of determination of vantilatory thresholds Diferenças entre variáveis de identificação dos limiares ventilatórios |
title |
Differences among variables of determination of vantilatory thresholds |
spellingShingle |
Differences among variables of determination of vantilatory thresholds Pires, Flávio de Oliveira |
title_short |
Differences among variables of determination of vantilatory thresholds |
title_full |
Differences among variables of determination of vantilatory thresholds |
title_fullStr |
Differences among variables of determination of vantilatory thresholds |
title_full_unstemmed |
Differences among variables of determination of vantilatory thresholds |
title_sort |
Differences among variables of determination of vantilatory thresholds |
author |
Pires, Flávio de Oliveira |
author_facet |
Pires, Flávio de Oliveira Lima-Silva, Adriano Eduardo Oliveira, Fernando Roberto de |
author_role |
author |
author2 |
Lima-Silva, Adriano Eduardo Oliveira, Fernando Roberto de |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Pires, Flávio de Oliveira Lima-Silva, Adriano Eduardo Oliveira, Fernando Roberto de |
description |
The objective of this study was to investigate the association and sensibility of variables that identify VT1 and VT2, employing the usage of both visual and mathematical methods. Twenty men underwent a progressive test on treadmill with initial velocity between 4 and 6 km.h-1, and increments of 1 km.h-1 per minute. The visual curve analyses of VE, VE/VO2, VE/VCO2, FeO2, FeCO2 and R were applied to VT1 and VT2 identification. The Vslope and multiple linear regressions mathematically determinated VT1 and VT2, respectively. In VT1, VE/VO2 was significantly higher than VE and V-slope methods, whereas in VT2 no significant differences were recognized. In VT1, no significant correlation was identified, despite the higher level of sensibility (75%-95%); In VT2, VE and FeCO2 demonstrated significant correlation coefficient (r= -0.71; p < 0.05) but only FeCO2 and VE/VCO2 demonstrated satisfactory level of sensibility (75% and 80% of individuals, respectively). The V-slope method and multiple linear regressions also demonstrated satisfactory levels of sensibility (75% and 90%, respectively). We concluded that different ventilatory variables may not determine the same points, suggesting dissociation among them and either may not show the same sensibility level. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-06-12 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion "Avaliado por Pares", Avaliado por Pares Descritiva |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.ufsc.br/index.php/rbcdh/article/view/3793 10.1590/%x |
url |
https://periodicos.ufsc.br/index.php/rbcdh/article/view/3793 |
identifier_str_mv |
10.1590/%x |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.ufsc.br/index.php/rbcdh/article/view/3793/3236 https://periodicos.ufsc.br/index.php/rbcdh/article/view/3793/16767 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
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. 7 No. 2 (2005); 20-28 Revista Brasileira de Cineantropometria e Desempenho Humano; v. 7 n. 2 (2005); 20-28 1980-0037 1415-8426 reponame:Revista Brasileira de Cineantropometria & Desempenho Humano (Online) instname:Universidade Federal de Santa Catarina (UFSC) instacron:UFSC |
instname_str |
Universidade Federal de Santa Catarina (UFSC) |
instacron_str |
UFSC |
institution |
UFSC |
reponame_str |
Revista Brasileira de Cineantropometria & Desempenho Humano (Online) |
collection |
Revista Brasileira de Cineantropometria & Desempenho Humano (Online) |
repository.name.fl_str_mv |
Revista Brasileira de Cineantropometria & Desempenho Humano (Online) - Universidade Federal de Santa Catarina (UFSC) |
repository.mail.fl_str_mv |
rbcdh@contato.ufsc.br || portaldeperiodicos.bu@contato.ufsc.br |
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1789435119483748352 |