NMW, are you diagnosed Celiac ? I'm undiagnosed because my doc tested me after I was gluten-free...lots of screw ups, certainly would have done things differently had I known more about celiacs. I even had a scope but, again, I was gluten-free for a few months and no one took any biopsies (the scope was more for GERD...which started suspiciously at the same time as my other symptoms...). I've since read that microscopic study of a biopsy, even at that stage, could have diagnosed me.
Anyway, exercise has also helped my IBS (yeah, probably really celiacs too!). Sometimes we start patterns for a reason, you know ? Before my issues really flared up (after a bad virus) I exercised regularly because it helped digestion and made me feel good, and helped with joint pain. For years I've avoided a lot of processed foods - sauces, soups, etc. - making things from scratch. Who knew - most of these things are contaminated with gluten.
Still, I would have liked to have a diagnosis because there are days where I know I have glutened myself and don't feel too bad (though the next day it can hit me a bit) and I question thing all over again...and then there are days where I feel glutened within 1/2 a hour of eating something and that's how I find yet another product I need to avoid.
Exercise also helps me to eat regularly - can't do a lot of activity without fuel. That helps digestion as well, as does drinking lots of water.
FWIW, I figure I'm either gluten intolerant or celiac. After last Thanksgiving I made a turkey barley soup and had stomach cramps while on a walk with my daughter afterwards, so I know it's not just wheat.