20+ years ago, I set up an old road bike of mine as a fixed-gear. Did it because I'd heard that riding fixed would help smooth out my pedalling action. I gave it a few weeks, decided that it was messing up my legs instead of helping 'em, so I switched the bike back to standard and gave it away. (This was back in the days of slotted cleats and toe clips....so when you were strapped in, you were really in.) I guess I didn't give it a fair shot, but I was riding/racing a lot and so wasn't really motivated to experiment. Noone outside of a velodrome was riding fixed back then.
Now I'm back riding again, and I've got an old bike that would be easy to convert to fixie. I'll probably do it just for fun, if nothing else. I've heard a lot of good reasons for riding fixies, now that they are all the rage, but I've not heard the old argument that it will improve your stroke.
So the question is: Does riding fixed gear improve your pedalling action?
OK, another question: Do fixie riders normally use toeclips, clipless, or ?