According to a review of evidence in a medical journal, runners live three years     1     (long) than non-runners .You don't have to run fast or for long     2     (see) the benefit. You may drink, smoke, be overweight and still reduce your risk of     3     (die) early by running.

While running     4     (regular) can't make you live forever, the review says it is more effective at lengthening life than walking, cycling or swimming. Two of the authors of the review also     5     (make) a study published in 2014     6     showed a mere five to 10 minutes a day of running reduce the risk of heart disease and early deaths from all     7     (cause) .

The best exercise is one that you enjoy and will do. But otherwise... it's probably running .To avoid knee pain, you can run on soft surfaces, do exercises to     8     (strength) your leg muscles (肌肉) ,avoid hills and get good running shoes. Running is cheap, easy and it's always     9     (energy) .If you are time poor, you need run for only half the time to get the same benefits as other sport, so perhaps we should all give it     10     try.