5 Answers

  1. There are two options. First, for some people, 4-5 hours of sleep is enough to restore the body's resources – the so-called short-sleepers. 8 hours of sleep is too much for such a person, he will wake up sluggish, broken, with a bad mood and a headache. While three hours of sleep will cheer you up well.

    On the other hand, on the contrary, three hours can be very short, and then it is perceived by the body as stress. In a state of stress, additional reserves of the body are mobilized, which can give an unusual cheerfulness.

  2. Sleep depends entirely on the physical and mental stress of the previous day. I don't believe in short sleepers and vice versa. It is more reasonable to relax and try to prolong sleep when you wake up very early. I am very close to the tradition of Orthodox Jews, according to which to wake a person up is to steal his health.

  3. It's not about how much sleep you've had, but what phase of sleep you've woken up in. Our sleep is divided into two phases: the REM sleep phase and the slow sleep phase. In the REM sleep phase, a person recovers psychologically, and in the slow – wave sleep phase-physically. A person feels most alert when they wake up in REM sleep. Now there are gadgets that can track the phase of a person's sleep and wake him up at a favorable time for waking up. These are special trackers and alarm clocks. So, after a three-hour nap, you probably just wake up in REM sleep, which is why you feel refreshed.

  4. This may depend for the most part on the phase of sleep in which you wake up. As far as I know, they take 3-4 hours, but it's better to Google them; even Wikipedia has information on this.

  5. To be honest, I'm not a master in this matter, but I have my own version.

    Try to switch to a daily 3-hour sleep, if you really will be more awake all day, then I envy you, I would like that.�

    I think the point is that:

    1. It is likely that if you sleep for 3 hours from time to time, the body feels such stress from lack of sleep mobilizes its reserves, and depletes them in exchange for normal activity. Perhaps this is due to evolution – blah, blah, hundreds of thousands of years ago, a sudden awakening often meant the presence of danger, so our ancestors had to get up and act quickly. And the slow guys died.

    2. After 3 hours of sleep, the body really recovers more or less, but does not have time to lie down. And after 8 o'clock, the muscles, roughly speaking, are so relaxed for so long that when you wake up, you are not immediately ready for active actions.

    It can also be just a matter of improper diet, daily routine and stress.

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