New Delhi, Nov 18 (ANI): Researchers have found that attaining higher levels of physical fitness lowers the risk of having heart attacks and increases survival among those suffering from coronary artery disease, whether or not they have had a procedure to open up their blocked arteries. Lead author Rupert Hung, a medical student at the Johns Hopkins University School of Medicine, said that in their study, the patients who were most fit had a 75 percent lower risk of dying from any cause compared to those who were least fit. The study included information on more than 9,800 adults who had been diagnosed with coronary artery disease.