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Originally Posted by joepole
>by the time you feel thirsty, you're already suffering from dehydration,
There's actually no scientific basis for that old wives' tale. Quite a few studies* have shown the opposite to be the case.
*[Phillips, P.A., Rolls, B.J., Ledingham, J.G.G. and Morton, J.J. (1984). Body fluid changes, thirst and drinking in man during free access to water. Physiology and Behavior , 33 , 357-363.] as an example
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Thirst itself isn't a sign of dehydration, you can inhale dust and become thirsty. Working up a sweat in the hot sun and feeling thirst IS a symptom of dehydration. If you've actually had a job where you worked in the sun, then you know all about the thirst that can't be quenched. Simply put, access to water doesn't have jack to do with the amount a person consumes or the amount that individual requires.
You know there's a reason you found this information in a 23 year old magazine article and not a medical book....