"Going for a jog on a treadmill can predict how long youre going to live a large new study suggests.  Researchers from Johns Hopkins Medicine looked at standard treadmill stress test results for more than  subjects ages  to . After age and sex the two best predictors of whether the patient would be alive in ten years was how highly activated their metabolism was and how fast their heart would beat during the test.  . Billion Young People at Risk of Losing Their Hearing WHO Says httpabcnews.go.comHealthbillionyoungpeoplerisklosinghearingstoryid Ebola Survivor Nina Pham Suing Hospital to Be Voice for Other Nurses httpabcnews.go.comHealthebolasurvivorninaphamsuinghospitalvoicenursesstoryid Scientists Make a Million Dollar Bet Who Will Die Last httpabcnews.go.comHealthantiagingscientistsmakemilliondollarbetdiestoryid Metabolism was calculated using metabolic equivalent of tasks or METs a measure of how much energy someone expends during a task. The higher MET level achieved the more likely it was the subject would last another decade.  The closer someone came to reaching their maximum heart rate as they ran the less likely they were to die within ten years compared to someone who only reached about  percent of their maximum heart rate during the test. Maximum heart rate was determined by subtracting the subjects age from  a formula thats been used for decades by exercisers and doctors alike.  Dr. Jennifer Ashton ABC News medical contributor explained the science behind the test on Good Morning America httpabcnews.go.comtopicsentertainmenttvgoodmorningamerica.htm.  In medicine we usually base predictions of survival on the absence or presence of a disease state she said. Whats new here is that there is now a fancy equation doctors can use to compare the chances of survival for one yearold woman against another yearold woman.  Rather than being viewed as morbid experts should be able to use this information to motivate people to change their behavior Ashton said. Everyone can improve their survival score by exercising more often and pushing it a little harder when they do she added.  This is in your power to change and improve your numbers. You can actually change your own destiny she said."