Want to live longer? Go for a run. According to the most recent analysis of an ongoing study of people living in Copenhagen, Denmark, men who run for between an hour and 2.5 hours each week increase their lifespan by 6.2 years, while women following the same training pattern add an extra 5.6. But, bad news for ultramarathoners: “Mortality is lower in people reporting moderate jogging than…those undertaking extreme levels of exercise,” said Peter Schnor, chief cardiologist of the Copenhagen City Heart Study. So, if adding years is your aim, stick to 10Ks. Via Runner's World.