Want to cut your risk of heart failure in half–OK, by 46 percent? You can do one hour of moderate exercise a day, or you can do one half-hour of vigorous exercise a day. Your choice. How do we know? Because when researchers at Uppsala University studied 39,805 people between the ages of 20 and 90 who did not have heart failure when a study started in 1997, they found that the group with the highest leisure time activity (more than one hour of moderate or half an hour of vigorous physical activity) had a 46 percent lower risk of developing heart failure. They also found that physical activity was equally beneficial for men and women. “You don’t need to run a marathon to gain the benefits of physical activity – even quite low levels of activity can give you positive effects”, says Kasper Andersen, study co-author and researcher at Uppsala University. Read more from Uppsala.