FIGURE 1.
Alteration of the microbial composition in elderly individuals. Both (a) OTU number and (b) Shannon index showed that the microbial α‐diversity increased with age in 2,011 people with a normal BMI. Comparing the microbial composition in elderly individuals to that in adults18‐60, (c) three phyla were significantly changed. (d) Twenty‐seven families were significantly changed in the microbial composition in elderly individuals with different exercise frequencies compared with that in adults18‐60