Fig 4 - Evaluation of a Cycling Exercise Test. Is Functional Threshold Power an Accurate Measure of Endurance Capacity?
Illustration of the correlation between power output at VT2 and FTP. The dashed line represents linear regression (y=132.2+0.78x; adjusted R 2 =0.645). Solid dots represent "non-cyclists" and circles represent "cyclists". FTP = Functional threshold power; VT2 = Second ventilatory threshold.