Exercise Alters Our Microbiome. Is That One Reason It's So Good for Us?

But those studies have been associational and could not show whether exercise actually altered microbes or how any microbial changes might later affect health. So for the new study, which was published in November in Medicine & Science in Sports & Exercise, scientists from the University of Illinois at Urbana-Champaign decided to track the guts of people who undertook an unfamiliar exercise routine.