Figure 4.

A, Scatterplot showing the test‐retest variability in VO_2max between the Omnical and Oxycon Pro systems (n = 12). The solid line represents the regression line and the dotted line the line of identity. B, Bland‐Altman plot for VO_2max as measured with the Omnical vs the Oxycon Pro system. Mean bias and 95% limits of agreement are indicated with dotted lines. The regression line shows there is a systematic bias that is proportional to the measured VO_2max. C, VO_2max plotted against P _max for both the Omnical (open circles) and Oxycon Pro (closed circles)