Running for two hours a week could add about three years to your life, a new study suggests. Analyzing existing literature on the link between exercise and longevity, a research team found that running at any pace is associated with an up to 40 percent lower risk for premature death, The New York Times reports. The researchers suspect that running reduces common risk factors, including high blood pressure and extra body fat, but say it’s also possible that runners are more likely to have other healthy habits, such as eating healthfully and not smoking. For reasons that aren’t clear, the benefits of other forms of exercise, such as walking and biking, weren’t as striking, accounting for a roughly 12 percent drop in risk of early death. Overall, most people who laced up their sneakers for two hours weekly would end up running nearly six months over the course of 40 years. The researchers calculated this would result in a net gain of about 2.8 years. The longevity benefits continue to climb up to a peak of about four hours of running a week, researchers said.