In the research I've done, AND in my personal experience, exercise exacerbates symptoms, often dramatically.

This is caused by many factors including raising blood-mercury levels via increased lymphatic system circulation, which in turn redistributes mercury in the body if there is no binding agent in the blood, which in turn can raise all sorts of problems.

For me, my immune system suffered to the point that I eventually could not exercise at all. I would get sick that night and the next day with flu-like symptoms.

Here's a link to my story where you can find many details about this:

http://herballure.com/HotTopics/MercuryAmalgam/MercuryBattle/index.html

Hope this helps.