“The study, published in the medical journal Preventive Medicine, finds that people who have consistently high levels of physical activity have significantly longer telomeres than those who have sedentary lifestyles, as well as those who are moderately active.”
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Larry A. Tucker, Physical activity and telomere length in U.S. men and women: An NHANES investigation, Preventive Medicine(2017). DOI: 10.1016/j.ypmed.2017.04.027