Is Being Active the
Fountain of Youth?

Need another reason to get active? A new study suggests that it might turn back the clock on aging. Researchers took blood samples from 2,401 healthy adults. They looked at the length of telomeres, which are sequences of DNA. Telomeres are thought to be a measure of biological aging because they shorten with age. Less active men and women had shorter telomeres than those who were more active, regardless of age. In fact, adults who spent about three hours a week being active had telomeres the same length as inactive adults 10 years younger.