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TL;DR
It found the 5-minute steady-state method provided the lowest estimate and recommended a shortened 12-minute assessment.
PLOS ONE · 12 authors, 6 centres
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It found the 5-minute steady-state method provided the lowest estimate and recommended a shortened 12-minute assessment.
Methods included short and long time interval (TI) windows, steady-state (SSt) criteria using 3, 4, 5, and 10-minute windows, and filtering at different intensities. A mixed one-way ANOVA revealed a statistically significant difference in RMR estimates across methods (F = 2.607, p = 0.04), with the 5-minute SSt method yielding the lowest mean RMR (1454 kcal.day^-1). All SSt methods produced acceptable coefficients of variation (<10% for VO2 and VCO2, <5% for RER) for most subjects. The study concluded that the 5-minute SSt method is suitable for assessing RMR in young athletes, enabling a valid estimation in approximately 12 minutes with low variation. Limitations include the lack of inter-day reproducibility assessment and the use of one-minute data samples.