Verification-phase tests show low reliability and add little value in determining VO2max in young trained adults

Wagner, Jonathan and Niemeyer, Max and Infanger, Denis and Hinrichs, Timo and Guerra, Clement and Klenk, Christopher and Königstein, Karsten and Cajochen, Christian and Schmidt-Trucksäss, Arno and Knaier, Raphael. (2021) Verification-phase tests show low reliability and add little value in determining VO2max in young trained adults. PLoS ONE, 16 (1). e0245306.

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This study compared the robustness of a [Formula: see text]-plateau definition and a verification-phase protocol to day-to-day and diurnal variations in determining the true [Formula: see text]. Further, the additional value of a verification-phase was investigated.; 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.; Participants mean [Formula: see text] was 56 ± 8 mL/kg/min. Gwet's AC1 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 [Formula: 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 [Formula: see text].; Compared to [Formula: see text]-plateau the verification-phase shows lower reliability, increases costs and only adds certain value in 2% of cases.
Faculties and Departments:03 Faculty of Medicine > Departement Sport, Bewegung und Gesundheit
UniBasel Contributors:Wagner, Jonathan and Hinrichs, Timo and Knaier, Raphael
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Public Library of Science
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:19 Jul 2023 08:29
Deposited On:29 Jun 2021 10:41

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