More is not always better. When it comes to running, for example, more than three hours a week appears to be no better than two to three hours a week, at least if living longer is a major goal. In fact, it appears to be worse. HealthDay reports on research conducted by the Cardiovascular Research Institute at the Lehigh Valley Health Network that looked at data from more than 3,800 men and women runners, average age 46, who were involved in the Masters Running Study. Nearly 70 percent of the runners ran more than 20 miles a week. The researchers found that people who get either no exercise or high-mileage runners both tend to have shorter lifespans than moderate runners. No, they don’t know why, but they do believe that the “sweet spot” for jogging for health benefits is a slow to moderate pace, about two or three times per week, for a total of one to 2.5 hours. Read more from HealthDay.