Glock - One question for you -- if a person is consuming that much clear water and not taking in enough electrolytes, wouldn't they notice that they were cramping up in their muscles before they get into a hyponatremia condition?

I'm one of those people who has issues with muscle cramping on a continuous basis and so I take additional calcium, magnesium and potassium to ward this off and to a lesser extent sodium. It would be impossible for a person like myself to NOT notice the severe cramps and hence realize the requirement for more salt and electrolytes right away. Other people's physiology will vary, but I just find it difficult to believe one could it sweat out and replace with only clear water and not be aware of any warning signs.