Figure 5. Relationship between maximal sustained power obtained duringbicycle test (W_max) and myocardial blood flow during adenosine infusion (MBF during ADO).

In UT, W_max was not related to MBF during ADO (r= 0.28, P= 0.44, grey squares), but in ET these parameters were inversely related (black squares and line, r= 0.64, P= 0.04). Interestingly, if the subjects are considered showing a continuum of inborn and acquired fitness, a curvilinear relation between fitness level and MBF during adenosine-induced hyperaemia in the whole subject population is observed (dashed line, y= 0.0002x²+ 0.0981x− 10.824, r²= 0.42, P= 0.002).