In the press recently, there have been a number of stories about the possible dangers of too much running.
I generally ignore these because a casual observation yields plenty of data indicating we, as a nation, are suffering tremendously from a lack of exercise.
Fortunately for us, Paul Williams is around to reinforce our world view. He hasn’t seen a downside to lots of running, and he’s looked at a lot of runners.
Williams is a researcher at the Lawrence Berkeley National Laboratory and is in charge of the worlds largest and longest study of runners.
This should give you all the information you need to shut up your sedentary relatives.