I was talking to a friend yesterday and he said, “I need to rebuild my runner’s gut bacteria”. I questioned him on the validity of what he was talking about. He explained that he used to hate running and thought people were lying when they said they enjoyed running. But after a while he got into running and found that he really enjoyed it.
Recently he got sick and took a round of antibiotics. When he recovered, he thought, “I don’t want to run, I can’t remember why I ever thought I liked that. In his anecdotal experience, the antibiotics that killed his good and bad gut bacteria was the key variable. He now thinks that as we run we develop a gut biome that helps us want to go for a jog and helps us enjoy it.
I haven’t experienced this, but I do know that if I eat sugar, I crave sugar more, so perhaps the same is true with exercise. The more we do it, the more we crave it.
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