Fig. 1.

Quality control of intestinal microbiota of all athletes. A: Distribution of the number of OTUs of samples before and after the 10-km open water swimming race; B: Alpha diversity sparsity curve of the intestinal microbiota of male athletes. The horizontal axis is the number of sequences, and the vertical axis is each diversity index; C: Alpha diversity sparsity curve of the intestinal microbiota of female athletes. The horizontal axis is the number of sequences, and the vertical axis is each diversity index; D: The horizontal distribution of the intestinal microbiota phylum of all athletes; E: The horizontal distribution of the intestinal microbiota genus of all athletes.