I am a 38 y/o male that has had the fortunate opertunity to have developed clusters 3 years ago. I am currently on 1000 mg of Depakote and Sumatriptan injections. My cycles seemed to have changed a little this year. I am now getting multiple attacks but when left untreated they last 2 to 2 1/2 hours. Now getting to my point, I think that I'm finding that any heavy cardio workout seems to be triggering them about 2 to 4 hours after the workout. Anybody else and if so, has anyone found a way around it?