 A new incentive to clean house. It might not feel like exercise, but a new nurse's health study finds even light physical activity like vacuuming and making beds increases your odds of healthy aging. That's defined as reaching 70 with no mental health or memory issues, no physical impairments or chronic disease. Researchers at Harvard, Brigham and Women's Hospital, and others in China and Australia also found every two hours of TV you watch a day,