I have only been here a few days, but am finding so much helpful information!

I've been waking in the night with the beginnings of charlie horses. Usually, if I awaken quickly enough, I can concentrate on tensing the muscles in my upper thighs as much as I can, and that will stop the charlie horse in it's tracks.

I worked out on our Nordic Track ski machine about a week ago, then I worked out again the past two days. I've had the charlie horses for several nights, but had just assumed they began as a result of my first workout. Obviously, I can see after reading this thread, there is probably more to it that that. Especially considering that I was suffering from them days after my first workout, but before my recent workouts.

I will look into eating more potassium rich foods. I am taking a calcium/magnesium supplement already.