Quote Originally Posted by Eden View Post
How fast are you spinning when it starts to happen? Everyone gets a bit choppy when they get really high. Some people can spin exceptionally fast and smooth (like pros who are known for sprinting ability), but many people start to bounce and get choppy at speeds over 110 -120 rpms or so. I can spin smoothly up to about 130 or so, but I rarely do this anywhere but on the trainer...
I am not spinning fast at all - indeed am still going fairly slow when it starts (I've only had my bike for 2 weeks). I DO know that one leg is stronger than the other - and my podiatrist suspects that one leg is shorter than the other. I do not notice this on the spinning bike in class, but that is not the same.

The trainer I am working with on conditioning for cycling (and who is a life-long avid cyclist and mountain-bike racer) isn't sure that it is a leg-strength issue - but of course he hasn't been present when it happens. I will ask him to show me the spinning drill with one leg - I do not have an indoor trainer and am trying to wait until next winter for that if I can. (Personal training sessions and new bike support has tapped me out for now