See, while riding I don't FEEL stiff, but looking at pictures I look extremely stiff. I had a bad accident in 2011 where I broke my back and doctors somehow didn't see it on the original xrays so by the time they saw it I suppose it was too late to really do much about it. I think that's where a lot of my stiffness comes from. I've been trying to get a referral from my doctor for physio as it no longer hurts at all but is obviously quite stiff while riding at least.
I'm also beginning to wonder if I arch my back just a little much? I feel like I almost exaggerate it a little because my biggest fault used to be that I leaned forward too much, or if I sat up tall I became a little "hunchy".
Also while I am thinking of it - one thing I have never been able to fix is my shoulders. Any tricks I can try to put them back and actually stay that way?