Originally posted by aerobat
What gearing are you using to start off with. If it is too big a gear, forcing you to put a lot of pressure on the pedals to accelerate, that can be hard on the knees. You might have to use a lower gear ratio to spin faster. Also warming up for a few minutes in the lower gear at the start of your ride can help.
I actually do this, and it does help in general with a warmup. as for knee pain I'd say maybe your seat post is too high? I'd try to fit the bike a different way to see if it resolves your problem. as for the look pedals, I have the wellgo (exactly the same as the look style) clipless and have not had any pain, so I don't think it would be those.
Sheldon Brown
I think he has a few articles on knee pain... hope this helps
