Does anyone else out there struggle with migranes or other chronic headaches? How do you manage to exercise through them? I'm having the hardest time moving my body while in the throes of headache pain, and since it's chronic (pretty much 24/7 for a couple weeks at a time), I know I have to find a way to get on with the exercise in spite of it. But it's awfully hard to hop on a treadmill when movement makes my head worse. Any tips/strategies/ideas?