It sounds as if Sue and I have some commonalities here.
Or did I forget to mention my rodeo riding?

Here is another example. In another post, I mentioned soreness at the base of the big toe. Now that the pain has settled in, I realize my original post wasn't quite correct.
The joint at the base of my big toe is sore and movement is restricted there. I'm also sore farther back on the foot on the proximal end of the metatarsal that goes to the big toe. So the whole end of that metatarsal is sore.
I can point to a few things which might have aggravated this area:
1) After spending months in PT because I was not pronating, I am now overpronating just a bit. Mind you, it's a very small overpronation, though.
2) I have a bad habit of rocking my weight forward onto the toe end of my foot when I am standing rather than standing so that the weight is spread out approximately equally over my whole foot.
3) I've been walking pretty much lately, but I'm not exactly walking 5 miles a day or doing 10 mile hikes.
And, boom! the base of my big toe is hurting! I know very well that there are plenty of people out there who are serious overpronators, who have worse standing posture than I do and who walk more than I do and they have no pain at the base of their big toes whatsoever.
I seem to be incredibly hypersensitive to this sort of thing.
Being aware of #1-3 above, I made the following changes:
1) I added a bit more arch support to my shoes to reduce my pronation.
2) I added more cushioning to my shoes to pad the sensitive area.
3) I saw a chiro who used some manipulative techniques to loosen up the restrictionas around my big toe and in my feet in general. I'll see him again next week.
4) I'm being more careful about how I stand. That's easy to do because now when I rock my weight forward, I hurt within about 15 seconds, causing me to make immediate adjustments to my standing.
The big toe isn't 100% better, but it's much improved with just these changes. Also, within 48 hours of increasing my arch support height, the nagging knee pain which has been dogging me for the last couple of months cleared up completely. I think the knee pain was being caused by my very mild overpronation also.
So is this AS-related? Or am I just aware enough of biomechanics that I recognize how I'm straining at sensitive areas? I don't expect you to be able to answer this question; I'm just shouting it to the winds in the hope that an answer will come back from somewhere.
I just don't know, but the question is driving me nuts, because the answer to that question determines what treatment will be appropriate for me.
My current hypothesis is that I have AS, given my HLA-B27 positive status. I just keep wondering if there is something else going on which is making me injury prone or if it's the AS which is doing it.
Karen