Here's an about.com article that says it's medically unsupported. [1] (about.com isn't a great source but hey it's someone who's looked into it) http://walking

Here's an about.com article that says it's medically unsupported. [1] (about.com isn't a great source but hey it's someone who's looked into it) http://walking.about.com/od/measure/f/10000steps.htm http://walking.about.com/od/measure/f/10000steps.htm FWIW I live in central DC and walk for about 90% of my total trips (although I have a sedentary job and a short commute), and the moves app says I go roughly 3mi/day, which squares with my intuition looking at a map.