Figure 4.

Additional uses of breath‐by‐breath data in evaluation of cardiorespiratory and metabolic disease in children. This is a schematic generalization of the determination of slopes of key CPET variables from a ramp‐type, cycle ergometry, progressive exercise protocol. Unlike the peak VO₂ or VO₂ max, which rely on a relatively small set of data obtained during very heavy exercise, the slopes are derived from a much larger set of data obtained throughout the exercise protocol. (See Cooper et al.31)