Between 20 and 40 minutes moderate to vigorous exercise a day cuts the risk of heart problems for people in their 70s, according to a study. Researchers tracked 2754 Italians aged 65 or over, during a period of approximately 20 years. They found the incidence of coronary heart diseases, heart failure, stroke and overall mortality were all reduced. Benefits were most marked among those aged 70, however – suggesting it helps to be active in “early later life”. They were only moderate among those aged 75 and no sign of corelation was observed at 80 or 85.