Lots of good suggestions! Thanks. I will try taking the magnesium in small doses throughout the day. I also have been reading sports medicine stuff on the internet. Figuring out exactly the right proportion of each mineral seems to be hard. Seems like it has to be trial and error because everyone and every situation is different. My main problem is that I am a horrible pill popper. Once I feel OK, I forget to take the pills! or supplements. For me, I still think it is age related- maybe I do not absorb the minerals like I used to. But thanks all, you gave me lots of good ideas.