They miss fewer days of work and recover more quickly when they do get sick. Stresses are routinely managed with a good run rather than by pills. Runners don't smoke and have healthy bodies. They know wonderful things, such as how quiet it is after a snowfall and how refreshing a warm summer rain feels. Runners often try the latest diets and supplements that promise better performance, but they do have a way to put those claims to the test.
Stopwatches never lie.
They have discovered that shoes need to be flexible and give cushioning and support, duplicating the foot plant as though running on grass or sand, and that the best shoe isn't always the most expensive or flashy looking. There is a down side to all this, however. Runners tend to feel invincible. This can cause problems, such as failing to wear sunscreen every day. Occasionally, runners get into trouble from dehydration, even though they know to drink enough water so that urine output is almost colorless.