I get horrid thigh cramps with intense exercise and dehydration. I do need to make sure I have enough magnesium, calcium and potassium in my diet, but on a primal diet, I have little issue getting thes right amount of these. 40 oz of water is enough for me if I'm sedentary. If I add exercise, I need more. I try to drink 16 ounces before I even start to work out. I usually wake up, have 16 oz of water, then drink another glass before any intense workout. I do a lot of distance hiking now that I have two foster Aussies, but I also do a lot of strenuous road biking (lots of mountains here in California), and mountain biking. Not to mention kettlebells, weight lifting, etc.
Wag more, bark less