Personal Note: I’ve had two friends diagnosed with hyponatremia. Both required hospitalization. One was told that he was just hours away from going into intractable seizures. This is nothing to fool around with. If untreated, both could have died. People have died in marathons from drinking too much water. This book is now on my “must read” list.
“The idea that you should drink ahead of thirst is absolutely nonsensical. As I’ve said, we’ve evolved from other creatures. We don’t need to be told when to drink. They regulated their fluid purely by thirst. So why should humans be different from every other creature on earth to be told when and how to drink? The reality is you don’t need to be told when and how much to drink. We have a 300 million year developed system that tells you with exquisite accuracy how much you need to drink and when you need to drink. It’s called thirst.” via Tim Noakes on the Serious Problem of Overhydration in Endurance Sports | Outside Magazine’s Articles | OutsideOnline.com.