Well. . . not exactly.
But, a recently long term study of exercise determined that moderate exercise, especially running, leads to lower death rates and better health. And you don't have to do a lot of running to live longer.
“We can say with certainty that regular jogging increases longevity,” Dr. Peter Schnorr, a cardiologist and an author of the study, said in presenting the findings at a clinical meeting organized last month by the European Association for Cardiovascular Prevention and Rehabilitation. “The good news is that you don’t actually need to do that much to reap the benefits.”
In fact, the study concluded that the "sweet spot" for the best benefit was relatively low. “Twenty miles a week or less of jogging at a 10- or 11-minute-mile pace can add years to your life span," according to Dr. O’Keefe. a cardiologist cited in the article. This is exactly what I do! YEAH!!
You can find the complete article about the study in the NY Times here.
On a personal note, I started running because I wanted to be healthy again and live longer. I didn't want to be one of those people who work themselves to death. So far so good. No regrets.