The microbiome of professional athletes differs from that of more sedentary subjects in composition and particularly at the functional metabolic level. Barton, W., Penney, N.C., Cronin, O., Garcia-Perez, I., Molloy, M.G., Holmes, E., Shanahan, F., Cotter, P.D. and O’Sullivan, O., 2018.Gut, 67(4), pp.625-633.