Fig. 2.

Intestinal microbiota distribution of athletes. A&B: histogram of microbiota distribution after race and probiotic supplementation in male athletes (A: phylum level; B: genus level); C&D: Histogram of microbiota distribution after race and probiotic supplementation in female athletes (C: phylum level; D: genus level). The horizontal axis is the experimental grouping, and the vertical axis is the relative abundance of each taxonomic entry (taxon). The part of the histogram with less than 100 % is the taxa identified as unclassified at this taxonomic level.