Biking is my main aerobic work-out, too. A couple of times a week I head over to the stadium at the high school and run the stairs. It's great for the legs and the mind, as well as for adding some variety. I don't walk nearly as much as I used to. I like biking everywhere I can instead. I have my eye on some indoor rock climbing for the winter. It's something I've always wanted to try, but I finally feel strong enough to try it. I'll probably also add a cheap gym membership, just for the winter, for weight training and (possibly) some group classes. I'd like to think I'm hardcore, but I don't think I'll be doing much biking in the Chicago winters.

kjb