YES!!! I have found that too!! I used to run a lot! SIX miles a day! I unfortunatley did some damage to my knee (poor shoes and lack of stretching!) But my knees are 100% again - but in the last few years I have quit running I had developed SEVERE migraines...missing lots of work (which is NOT like me at all!). I have seen a couple different neurologists, had CT scans, bloodwork, and finally went to a headache specialist. He suggested the occipital nerve block procedure. (but holding off on that unless I have to) I'm currently on topomax, relpax, and prior to starting to run again I would run out of my relpax (insurance would only allow six pills per month) in two weeks time!! I was getting them CONSTANTLY!!!! Well, the doctor suggested I started to run again b/c he said your body produces pain endorphins when you excercise....so I thought...what the heck!! So about a month ago I started my 'jogging' again....I have jogged 4 miles per day (about 4-5 days a week) at 5% incline on my treadmill and can you believe I have not had ONE headache since I have started this up?? I'm in total disbelief! I'm thrilled to say the least b/c these headaches have been ruling my LIFE for the past YEAR....and I have felt WONDERFUL in the past month....I have not had to take a single ounce of medication and I have my life back!! I can only hope it continues!! The 'side effects' of losing a little extra weight doesn't hurt either!!
But let me do clarify that when I was HAVING a migraine, running would intensify it - BIG TIME. I had to find a time when I was feeling decent enough to jog to start jogging....sounds crazy I know....but that is how my body works!