* p ≤ .05; *** p ≤ .001
Figure 3: Panel A and B present Pearson correlation coefficients between competition year and winning riders’ mean km/h and time performances across stage races. Panel C and D show the Pearson correlation coefficients between competition year and the mean proportional changes (%) per year for both performance measures, averaged across races. Panel E and F present the distribution of the latter performance measures. Vertical dotted lines mark the epo era (1990–2000), horizontal dashed lines present the individual 95%–prediction interval.