I walk or ride a stationary bike when I'm feeling up to it. Even on a good day, walking more than 40 minutes can cause very severe problems, including migraine. So I do exercise in small chunks. There are many days when I'm not up to anything so I don't push it.

I tried yoga in the very beginning of TOS. I liked it but there was too much arm forward activity that caused flares. I did some resistance band work in PT after surgery -- a very bad idea I learned only afterward. Cardio is hard because there is too much neck and shoulder movement.

I think the TOX maxim holds true -- if it hurts or causes increased pain later, don't do it.