A Workout Can Change Your DNA

Reporting in Cell Metabolism, researchers write that when people who lead relatively sedentary lives worked out the DNA in their muscle fibers changed almost immediately. Scientists also found caffeine had the same effect on isolated rodent muscles. Study co-author Juleen Zierath discusses the DNA modifications.

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Juleen Zierath

Juleen Zierath is a professor of Clinical Integrative Physiology at the Karolinska Institute. She’s based in Stockholm, Sweden.