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Verification-phase tests show low reliability and add little value in determining [Image: see text] O(2)max in young trained adults
OBJECTIVE: This study compared the robustness of a [Image: see text] -plateau definition and a verification-phase protocol to day-to-day and diurnal variations in determining the true [Image: see text] . Further, the additional value of a verification-phase was investigated. METHODS: Eighteen adults...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7799856/ https://www.ncbi.nlm.nih.gov/pubmed/33428687 http://dx.doi.org/10.1371/journal.pone.0245306 |
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author | Wagner, Jonathan Niemeyer, Max Infanger, Denis Hinrichs, Timo Guerra, Clement Klenk, Christopher Königstein, Karsten Cajochen, Christian Schmidt-Trucksäss, Arno Knaier, Raphael |
author_facet | Wagner, Jonathan Niemeyer, Max Infanger, Denis Hinrichs, Timo Guerra, Clement Klenk, Christopher Königstein, Karsten Cajochen, Christian Schmidt-Trucksäss, Arno Knaier, Raphael |
author_sort | Wagner, Jonathan |
collection | PubMed |
description | OBJECTIVE: This study compared the robustness of a [Image: see text] -plateau definition and a verification-phase protocol to day-to-day and diurnal variations in determining the true [Image: see text] . Further, the additional value of a verification-phase was investigated. METHODS: Eighteen adults performed six cardiorespiratory fitness tests at six different times of the day (diurnal variation) as well as a seventh test at the same time the sixth test took place (day-to-day variation). A verification-phase was performed immediately after each test, with a stepwise increase in intensity to 50%, 70%, and 105% of the peak power output. RESULTS: Participants mean [Image: see text] was 56 ± 8 mL/kg/min. Gwet’s AC(1) values (95% confidence intervals) for the day-to-day and diurnal variations were 0.64 (0.22, 1.00) and 0.71 (0.42, 0.99) for [Image: see text] -plateau and for the verification-phase 0.69 (0.31, 1.00) and 0.07 (−0.38, 0.52), respectively. In 66% of the tests, performing the verification-phase added no value, while, in 32% and 2%, it added uncertain value and certain value, respectively, in the determination of [Image: see text] . CONCLUSION: Compared to [Image: see text] -plateau the verification-phase shows lower reliability, increases costs and only adds certain value in 2% of cases. |
format | Online Article Text |
id | pubmed-7799856 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-77998562021-01-22 Verification-phase tests show low reliability and add little value in determining [Image: see text] O(2)max in young trained adults Wagner, Jonathan Niemeyer, Max Infanger, Denis Hinrichs, Timo Guerra, Clement Klenk, Christopher Königstein, Karsten Cajochen, Christian Schmidt-Trucksäss, Arno Knaier, Raphael PLoS One Research Article OBJECTIVE: This study compared the robustness of a [Image: see text] -plateau definition and a verification-phase protocol to day-to-day and diurnal variations in determining the true [Image: see text] . Further, the additional value of a verification-phase was investigated. METHODS: Eighteen adults performed six cardiorespiratory fitness tests at six different times of the day (diurnal variation) as well as a seventh test at the same time the sixth test took place (day-to-day variation). A verification-phase was performed immediately after each test, with a stepwise increase in intensity to 50%, 70%, and 105% of the peak power output. RESULTS: Participants mean [Image: see text] was 56 ± 8 mL/kg/min. Gwet’s AC(1) values (95% confidence intervals) for the day-to-day and diurnal variations were 0.64 (0.22, 1.00) and 0.71 (0.42, 0.99) for [Image: see text] -plateau and for the verification-phase 0.69 (0.31, 1.00) and 0.07 (−0.38, 0.52), respectively. In 66% of the tests, performing the verification-phase added no value, while, in 32% and 2%, it added uncertain value and certain value, respectively, in the determination of [Image: see text] . CONCLUSION: Compared to [Image: see text] -plateau the verification-phase shows lower reliability, increases costs and only adds certain value in 2% of cases. Public Library of Science 2021-01-11 /pmc/articles/PMC7799856/ /pubmed/33428687 http://dx.doi.org/10.1371/journal.pone.0245306 Text en © 2021 Wagner 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 Wagner, Jonathan Niemeyer, Max Infanger, Denis Hinrichs, Timo Guerra, Clement Klenk, Christopher Königstein, Karsten Cajochen, Christian Schmidt-Trucksäss, Arno Knaier, Raphael Verification-phase tests show low reliability and add little value in determining [Image: see text] O(2)max in young trained adults |
title | Verification-phase tests show low reliability and add little value in determining [Image: see text] O(2)max in young trained adults |
title_full | Verification-phase tests show low reliability and add little value in determining [Image: see text] O(2)max in young trained adults |
title_fullStr | Verification-phase tests show low reliability and add little value in determining [Image: see text] O(2)max in young trained adults |
title_full_unstemmed | Verification-phase tests show low reliability and add little value in determining [Image: see text] O(2)max in young trained adults |
title_short | Verification-phase tests show low reliability and add little value in determining [Image: see text] O(2)max in young trained adults |
title_sort | verification-phase tests show low reliability and add little value in determining [image: see text] o(2)max in young trained adults |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7799856/ https://www.ncbi.nlm.nih.gov/pubmed/33428687 http://dx.doi.org/10.1371/journal.pone.0245306 |
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