Figure 1.

Representation of the procedure for computing the respiratory exchange ratio (RER) and the resting metabolic rate (RMR; i.e., resting energy expenditure [REE] estimated using the equation proposed by Weir [30] and assuming no urinary nitrogen excretion) using the measured volume of oxygen consumption (VO₂) and volume of carbon dioxide production (VCO₂) gas exchange (Panel (A)), and the procedure for computing each coefficient of variation (CV, in percentage; Panel B). These are actual data from a participant included in the present study. The blue line represents the VO₂, the yellow line represents the VCO₂, the black line represents the RER, and the red line represents the RMR (i.e., REE). In both panels, the data highlighted in gray represents the 5 min data discarded following current recommendations [15]. In Panel (B), the dashed line represents the data used to compute the CV for each gas exchange parameter (i.e., CV for VO₂, VCO₂, RER, and REE). In Panel B, the left y-axis represents the gas exchange in milliliters per minute (mL/min) and RER, and the right y-axis represents the REE in kilocalories per day (kcal/day).