A 2005 study in the New England Journal of Medicine found that close to one sixth of marathon runners develop some degree of hyponatremia, or dilution of the blood caused by drinking too much water.
Going overboard in attempts to rehydrate is also common among endurance athletes. Club-goers taking MDMA ("ecstasy") have died after consuming copious amounts of water trying to rehydrate following long nights of dancing and sweating. In 2005 a fraternity hazing at California State University, Chico, left a 21-year-old man dead after he was forced to drink excessive amounts of water between rounds of push-ups in a cold basement. There are many other tragic examples of death by water. After downing some six liters of water in three hours in the "Hold Your Wee for a Wii" (Nintendo game console) contest, Jennifer Strange vomited, went home with a splitting headache, and died from so-called water intoxication. There is such a thing as a fatal water overdose.Įarlier this year, a 28-year-old California woman died after competing in a radio station's on-air water-drinking contest.
Replacing these lost stores is essential but rehydration can be overdone. At every moment water escapes the body through sweat, urination, defecation or exhaled breath, among other routes. Making up about 66 percent of the human body, water runs through the blood, inhabits the cells, and lurks in the spaces between.
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