Kind of crazy but after suffering from leg cramps, often doubles on both legs at same time, I read (should say reread) something on Mayo to be sure and loosen all the sheets at the bottom of the bed, give your legs plenty of room to move around. I track this and it works sometimes but not always. Since doing this I have cut back on the number of nightly leg cramps and now have very few doubles. I've pretty much done everything else they suggest like water, electrolytes, stretching, heat, etc.