Quote:
Originally Posted by freak_of_nature
But i always drink a gallon of water a day
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Staying hydrated is good, but just taking in a flat amount of fluid is not as good.
For example if it is an excessively hot day, and you do a tough workout the fluid level in your body is drastically different with that gallon of water, than on a colder day in which you may be "resting" and still drink that gallon of water.
Your hydration levels WILL fluctuate based on heat/activity level and to some extent the foods you eat, any caffeine, medications etc. You may have to adjust your intake based on each day's factors.