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Usually, we sleep up to 7-10 hours. A healthy human drinks 2-3 cups per hour. Why don't we wake up from thirst if during the day, it is normal to drink so much?

I don't think that this is because you are paralysed during sleep. Your cells still need to stay alive, make ATP and proteins!

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    $\begingroup$ "A healthy human drinks 2-3 cups per hour." — That's between 7 and 12 litres per day. I don't think I myself drank more an 1L today. I guess I'm not very healthy then. Why do you claim that people drink so much? $\endgroup$ Dec 13, 2021 at 1:33
  • $\begingroup$ health.harvard.edu/staying-healthy/…. I searched it up. $\endgroup$
    – user29886
    Dec 13, 2021 at 2:01
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    $\begingroup$ That reference says "Most people need about four to six cups of water each day." $\endgroup$ Dec 13, 2021 at 2:07
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    $\begingroup$ @RayButterworth I think the confusion is from the fact that it says later in the same section that "a general rule of thumb for healthy people is to drink two to three cups of water per hour, or more if you're sweating heavily." $\endgroup$ Dec 13, 2021 at 11:55
  • $\begingroup$ @EmmaGao Could you please incorporate that reference in your question? It makes it a better question, that can lead to you getting an answer sooner! The current comment thread would have been unnecessary. Whenever you have sources for your claims, please cite/link them! ;) $\endgroup$
    – Steven Jeuris
    Dec 23, 2021 at 10:53

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