I have, what I think is a really bad habit - and it was pointed out to me by my nephew a while ago, so it is engrained.
When I cycle, my legs don't just go up an down in the same plane, which I assume is ideal - but on the up up stroke I stick my knees out. Like handle bar width out ...
Now , some of this might be driven by physiology - I have very chunky thighs, but the rest is probably learned.
At the same time, I now beginning to get knee pain - so to try and correct this
1) I have gone back to using SPDs - to try and hold my feet in position. On flatties, if I look down at me feet they can be at any angle under the sun but very rarely facing straight forward
2) Raised the saddle - I think I have been riding with the saddle about 2 or cms too low. This seems to help (it pushes me slightly forward on the saddle and makes "in plane" leg movement easier). Probably the trade off is comfort.
Any other suggestions, or is this nothing to worry about?