On: Why cul-de-sacs are bad for your health

[pgrote]

The same people who gave us the drink 8 glasses of water a day.

I did find two studies related to amount of walking to show health benefits:

http://link.springer.com/article/10.2165/00007256-199723050-...

http://wlv.openrepository.com/wlv/handle/2436/11110

No mention of number of steps. I think people add it for a way to equate a certain amount of time walking.