Anyone do it? Seems like it would be hard to have a fixie and get exercise, go for long rides, etc just because if you hit a super steep hill you might not be able to keep it up.

Any hints, suggestions, or discouragments you'd like to give me? I'm about to jump on the fixie wagon and would like to know if any of you are able to ride your fixie's to stay healthy. I recently sold my road bike (old Trek 2200) and regret it. Ended up buying a folding bike for the commute (Dahon Speed Pro) but want a big bike I can really womp on.

Recently got an offer for Specialized Langster Comp for $900 (2007 model)... so I'm deciding if I should go for it.