An hour of running may add 7 hours to your life

New study found, runners tended to live about three additional years

Running may be the single most effective exercise to increase life expectancy, according to a new review and analysis of past research about exercise and premature death. The new study found that, compared to nonrunners, runners tended to live about three additional years, even if they run slowly or sporadically and smoke, drink or are overweight. No other form of exercise that researchers looked at showed comparable impacts on life span.

The findings come as a follow-up to a study done three years ago, in which a group of distinguished exercise scientists scrutinised data from a large trove of medical and