I've never been one to suffer from knee problems. If I really hammered it, I might get soreness, but that would be sore all round all muscles.
Since starting to try getting going again, I'm getting soreness in my left knee. Feels like cleat (multi-release in M520 pedals) is in wrong position, when clipped in there is no 'slack' in the rotation to the left at all. Cleat hasn't moved on shoe.
What has changed is that I had bone taken out of pelvis on that side. So there is a bit of the Iliacus muscle has been cut away (no attachment point for it anymore, that was used for the graft). I'm wondering if that has changed the 'gait' of my leg when pedalling. Does that sound likely?
Will probably turn the cleat a tiny fraction to see if that clears things up a bit.