Physical activity protects heart

A study from Italy found that at least 20 minutes of physical activity can help avoid cardiovascular problems in your 70s, according to the journal Heart. The study followed 2,800 people ages 65 and older for 20 years. People who did moderate activity (brisk walking) or vigorous activity (gardening, biking swimming, dancing) had fewer heart attacks. Among men, 20 minutes of daily exercise was associated with a 52 percent lower risk of heart problems, compared with those who didn't exercise.