Athletes’ Microbiomes Differ from Nonathletes

Researchers are beginning to uncover a link between activity level and the microbial makeup of one’s gut.

| 5 min read
a woman riding a mountain bike in the woods

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MICROBIOME RACER: Lauren Petersen competing in a mountain bike race in 2016.ANDREW SANTORO

Genomicist Lauren Petersen has been racing mountain bikes since she was 14 years old. But throughout her teens she battled chronic Lyme disease, suffering recurring bouts of illness that sometimes kept her off her wheels. “I’d feel like crap for a month or two, and then the antibiotics would make me feel like crap, and then I’d rebound a little bit and be okay for a while,” she recalls. “It was continuous peaks and valleys.”

For seven years, Petersen’s doctors prescribed her a barrage of antibiotics. In 2003, at age 21, she took two or three broad-spectrum antibiotics at a time for an entire year, a regimen that she says seemed to finally kick the Lyme. But she wasn’t well. “Even when I wasn’t sick ...

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Meet the Author

  • Jef Akst

    Jef Akst was managing editor of The Scientist, where she started as an intern in 2009 after receiving a master’s degree from Indiana University in April 2009 studying the mating behavior of seahorses.

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