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https://www.sleepadvisor.org/3-hours-of-sleep/
This will depend largely on how your body responds to resting this way. Some people are able to function on only 3 hours very well and actually perform better …
https://www.sleepunderground.com/3-hours-of-sleep/
Technically, when you sleep for three hours a day, your brain impedes sex hormone synthesis, including testosterone and estrogen. Instead, it counter-produces more cortisol, which lowers your sex drive. Although other factors such as stress and depression influence cortisol production profoundly, lack of sleep also plays a synergistic role. 3.
https://fmidr.com/the-power-of-the-sleep-cycle/
It will be a multiple of 90 minutes from when you first went to bed. This 90 minutes is known as a sleep cycle, and it’s how I live my life. If there are drugs such as Ambien, Lunesta, Benadryl etc. on board these interrupt the body’s natural rhythms. In medical school we are forced to learn how to sleep on the run. Typically, I sleep 3 hours a night, and nap for 90 minutes in the evening.
https://kantantechnology.com/how-i-added-five-more-ultra-productive-hours-to-my-day-and-how-you-can-too-cf2749b6fd1e
So how does one sleep only three hours at night and still get enough deep sleep? Polyphasic Sleep (as opposed to Monophasic sleep, or sleeping once a day) is the idea of breaking your sleep into smaller chunks, or naps, to maximize your waking hours. The hope is to drop light sleep and achieve deep sleep each time you close your eyes.
https://www.uofmhealth.org/health-library/hw48331
You do most of your dreaming during REM sleep. But your brain paralyzes your muscles so you do not act out the dreams. During sleep, a person usually progresses through the 3 stages of non-REM sleep before entering REM sleep. This takes about 1 to 2 hours after falling asleep. The cycle is repeated three to four times each night.
https://www.nectarsleep.com/p/sleep-calculator/
A typical night’s sleep consists of about 5-6 full sleep cycles. But each of these sleep cycles is different from one another. During the first 2-3 sleep cycles, you spend most of the time in a deep NREM sleep. In the final 2-3 sleep cycles, you will spend more time in REM sleep and stage one light sleep.
https://www.sleepfoundation.org/how-sleep-works/stages-of-sleep
In a typical night, a person goes through four to six sleep cycles. Not all sleep cycles are the same length, but on average they last about 90 minutes each. Are All Sleep Cycles the Same? It is normal for sleep cycles to change as you progress through your nightly sleep. The first sleep cycle is often the shortest, ranging from 70-100 minutes, while later cycles tend to fall between 90 and 120 …
https://www.dreams.co.uk/sleep-matters-club/4-alternative-sleeping-cycles-infographic/
https://www.reddit.com/r/NoStupidQuestions/comments/djz6it/since_a_full_sleep_cycle_is_about_3_hours_if_you/
Today that was about 6 + 2 + 1.5 = 9.5 hours minus time getting to sleep, probably more like 8.5. If it takes awhile for you to get to sleep, you need to factor that in. If it always takes you an hour to get to sleep, then a 3 hour sleep time is really only 2 hours of sleep and you're spending 3 hours a day trying to get to sleep instead of 1. But maybe you wouldn't have that problem on that schedule.
https://www.healthline.com/health/irregular-sleep-wake-syndrome
A physician will look for a minimum of three cycles of sleeping and waking within a period of 24 hours to make a diagnosis. Managing irregular sleep-wake syndrome There’s no simple cure for ...
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