Fig. 2.

OPLS-DA model comparing moderate- versus high-endurance classes of elite athletes. a A score plot showing the class-discriminatory component (x-axis) versus orthogonal component (y-axis). b The corresponding loading plot showing a clustering of steroids and monohydroxy-fatty acids at the high end of endurance opposed by a clustering of diacyl-glycerols and gamma-glutamyl amino acids at the negative end