On a molecular level, biological age is measured using something called the epigenetic clock, which isn't tied to chronological age in calendar years. As chronological time marches on, how can you slow your epigenetic clock? Research suggests that lifestyle choices (e.g., diet, exercise, stress management) can slow down epigenetic aging or even rewind it. As the authors explain:Emerging evidence suggests that physical activity, exercise, and physical fitness may delay or reverse epigenetic aging, with implications for the extension of healthspan. Exercise strengthens mitochondria, converting what could be harmful oxidants into hormetic signals that protect cells and refresh the epigenome in ways that actively slow aging.