[phil21]

It adds up a lot. I split my time between a typical suburban car-centric city (Minneapolis), and a place just off the El in Chicago.

The weeks I am in Chicago I lose weight without really trying - simply from walking to/from the train every day and around the neighborhood running errands. Then of course lunch in the office which of course is another walk away. All those little walking trips add up to miles/day without even noticing and add up to a noticeable change in weight loss/gain.

Minneapolis it's rare to walk more than 100ft (to a car and back) to go anywhere - unless you make a concerted conscious effort to take time to walk for the sake of walking.