<<Disclaimer: Verify this information before applying it to your situation.>> Hi All, I was wondering if anyone had had a similar experience. I cannot exercise without getting leg cramps and fatigue for 2 days afterwards. I believe it is probably a lack of Calcium/Magnesium, but when I take a 500mg Calcium, 250mg. Magnesium, I end up in the bathroom 15-30 minutes later. (No diarrhea, just cramps and urgency to go). This has become a catch-22 situation, because I want to exercise, but can't. Any suggestions. Thanks in advance. Will summarize. Karen D'Andrea in Massachusetts, USA