[windowsrookie]

You're already talking yourself out of walking and you haven't even started. ;)

12 miles is totally doable, but start with less because you'll injure yourself if you don't walk at all now. Even just 15 minutes of walking is great.

I am more of a bicyclist and luckily there are many trails around me. (I don't like riding on the streets) On a nice summer day I can easily spend 3 hours riding. If you work a full time 9-5, there is still plenty of time in the morning or evening to get a few hours of exercise in . (I should take my own advice here!)

[comprev]

I'm a cyclist too and in the recent good weather I've averaged about 50km per day (split into morning/evening rides) during the week and usually a 70-80km ride one weekend day. Making the most of the weather while it lasts!