Perhaps one reason is that, in practical terms, it doesn't really make much difference how fast you run. Even if you run at a world-record pace, his formula shows that you will only get 10 per cent less wet. Hardly worth the bother of running really. read more
The amount of rain drops that you will get hit by (in idle conditions, the area each person walks is equally dense as far as rain drops) is exactly the same whether you run or if you walk, as long as the time you are in the rain is the same. read more