Fig. 4

Graphic representation of the correlations between signalment data and performance parameters in the whole sample. The line represents the regression line. (a) Correlation between the mean racing speed (in m/s) and age (in years). (b) Correlation between the best time (in s, ms) and age (in years). For the sake of simplicity, minutes have been excluded from the best time, which should be considered to be with 01 min (e.g., 01 min 13 s 8 milliseconds). (c) Correlation between the number of races and age (in years). (d) Correlation between the number of placements and age (in years)