You make a fair point, particularly with regard to road to TT positions, although those are quite small changes relative to 6cm, as well as moving away from a grossly 'bad' saddle height. I suppose I look at it this way; if one wasn't sore in the old position, presumably because one had adapted to that bad position, then there would be little reason to expedite the change to avoid potential injury from the status quo. Any change from that position, be it small or large, in terms of cms, or a more aggressive position would likely need a period of adaption, so time, take it easy, keep the distance down etc, and on-going review. (If one wanted to apply basic experimental design, one wouldn't change anything else at the same time eg other activities etc, but life is too short!). EmJayZA's comments about more power & going longer (both changes as well), sore quads, suggest to me, that adaption to a large change may have been flawed (but how would I know?!). So maybe the positional change could have been adapted to more slowly in terms of time/effort etc, or maybe the positional change could have happened more slowly? Or maybe neither were the 'problem' and the increase in running mileage was the issue?? In my case, which obviously influences my thinking, I know I adapt v slowly to change, so if my road bike position changes, by less than 5mm, I get knee and ITB issues. If I move between 2 bikes with differing set-ups infrequently enough, I get knee and ITB issues. An aggressive position, for me, needs lots of back stretching, to avoid messing with my SI, pelvis, hammie, quad, ITB, knee chain. But I know mates who can adapt at the drop of a hat!
