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Getting regular exercise may help slow the aging of your body's cells , a new study finds. Compared with the people in the study who didn't exercise at all, the highly active people had a " biological age " that was about nine years younger, said study author Larry Tucker, a professor of exercise science at Brigham Young University in Utah. To reap these benefits of exercise , you'd need to spend 30 to 40 minutes running, five days a week, according to the study. In the study, Tucker looked at data on more than 5,800 people ages 20 to 84 who had taken part in a health survey conducted by the Centers for Disease Control and Prevention. The survey, called National Health and Nutrition Exami... Full story

19 May