According to a review of evidence in a medical journal, runners live three years (long) than non-runners. Two of the authors of the review also made a study published in 2014 showed a mere five to ten minutes a day of running reduced the risk of heart disease and early death from all (cause).
(avoid) knee pain, you can run on soft surfaces, do exercise to strengthen your leg muscles, avoid hills and get running shoes. Running is always (energy). If you are time poor, you need run for only half the time to get the same benefits as other sports, so perhaps we should all give it a try.