i live in the city and work out in the suburbs of chicago. however, my job is in IT so i sit for 8 hours a day. if it weren't for biking into work, i'd hardly have time to exercise - i come home to a family with 2 kids whom we also homeschool and i am going to start night classes full time in a week. i feel 100% better on days i bike into work (30 miles roundtrip).
that - and i can feel confident, with biking, that i'm not just giving lip service to the notion of alternative energy and less fuel consumption. i'm not casting a vote, not leaving it up to anyone else, but taking iniative myself. that is a huge motivator for me, especially when i imagine the type of world my kids might have to grow up in.