In a new study ,researchers have found that moderate exercise could halve the risk of dying from a heart attack for someone in their fifties or sixties. Just 25 minutes of brisk walking a day can add up to seven years to your life, according to health experts. A new study presented at the European Society of Cardiology (ESC) Congress suggested that regular exercise can increase life span. A group of 69 healthy non-smokers, aged between 30 and 60, who did not take regular exercise were tested as part of the study at Saar land University in Germany. Blood tests taken during six months of regular aerobic exercise, high-intensity interval training and strength training showed that an anti-aging process had been triggered and helped repair old DNA. “This suggests that when people exercise regularly, they may be able to retard the process of aging,” said Sanjay Sharma, professor of inherited cardiac diseases in sports ca