OBJECTIVE: 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. 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 [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]. CONCLUSION: Compared to [Formula: see text]-plateau the verification-phase shows lower reliability, increases costs and only adds certain value in 2% of cases.
OBJECTIVE: 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. 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 [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]. CONCLUSION: Compared to [Formula: see text]-plateau the verification-phase shows lower reliability, increases costs and only adds certain value in 2% of cases.
Authors: A Lucía; M Rabadán; J Hoyos; M Hernández-Capilla; M Pérez; A F San Juan; C P Earnest; J L Chicharro Journal: Int J Sports Med Date: 2006-05-30 Impact factor: 3.118
Authors: Raphael Knaier; Max Niemeyer; Jonathan Wagner; Denis Infanger; Timo Hinrichs; Christopher Klenk; Sabrina Frutig; Christian Cajochen; Arno Schmidt-TRUCKSäSS Journal: Med Sci Sports Exerc Date: 2019-05 Impact factor: 5.411
Authors: Raphael Knaier; Denis Infanger; Max Niemeyer; Christian Cajochen; Arno Schmidt-Trucksäss Journal: Front Physiol Date: 2019-03-18 Impact factor: 4.566
Authors: Felipe Mattioni Maturana; Rogerio N Soares; Juan M Murias; Philipp Schellhorn; Gunnar Erz; Christof Burgstahler; Manuel Widmann; Barbara Munz; Ansgar Thiel; Andreas M Nieß Journal: Physiol Rep Date: 2021-08
Authors: Felipe Mattioni Maturana; Philipp Schellhorn; Gunnar Erz; Christof Burgstahler; Manuel Widmann; Barbara Munz; Rogerio N Soares; Juan M Murias; Ansgar Thiel; Andreas M Nieß Journal: Eur J Appl Physiol Date: 2021-04-03 Impact factor: 3.078
Authors: Ian R Villanueva; John C Campbell; Serena M Medina; Theresa M Jorgensen; Shannon L Wilson; Siddhartha S Angadi; Glenn A Gaesser; Jared M Dickinson Journal: Physiol Rep Date: 2021-09