A new activity tracker can now determine the amount of exercise needed to reduce the risk of death from cardiovascular disease. Personal Activity Intelligence (PAI) is the first activity tracking scoring system that uses heart rate to help individuals achieve optimal health. PAI works by translating heart rate data from physical activity and personal information into one simple score. The goal is to keep the PAI score above 100 over a seven-day period to protect yourself from premature death related to cardiovascular disease. Investigators found that men and women with a PAI score over 100 have a 17% to 23% lower risk for cardiovascular disease mortality than those who are largely inactive. Lead author Dr. Javaid Nauman explains, “The more elevated your heart rate is during exercise, the more quickly you accumulate PAI points, but you can also work out at lower intensities for longer durations to earn PAI. Our research shows that keeping your PAI score at 100 or above could prevent premature death.” European Society of Cardiology, September 2016