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https://www.newser.com/story/140307/forget-8-hours-of-sleep-try-4-hours-twice.html#:~:text=A%20number%20of%20recent%20studies%20have%20pointed%20to,14%20hours%20a%20day%20in%20a%20month-long%20study.
https://www.newser.com/story/140307/forget-8-hours-of-sleep-try-4-hours-twice.html
Forget 8 Hours of Sleep: Try 4 Hours, Twice History suggests it could be the 'natural' way ... A researcher in the 1990s put subjects in darkness 14 hours a day in …
https://www.sciencealert.com/humans-used-to-sleep-in-two-shifts-maybe-we-should-again
For example, 6 hours on/6 hours off, 4 hours on/8 hours off, and 8 hours on/8 hours off, limiting time on shift and reducing extended periods of wakefulness. Split sleep/work schedules divide the day into multiple work/rest cycles so employees work multiple short shifts, broken up with short off-duty periods every 24 hours.
https://www.inc.com/chris-matyszczyk/why-science-says-you-should-sleep-twice-a-day-not-once.html
The doctors say there's scientific evidence that one of the reasons for sleep disorders may be that bodies genetically don't want to sleep for one 7- or 8-hour period.
https://www.today.com/health/nap-time-researchers-say-sleeping-twice-day-good-you-t98716
Researchers say sleeping twice a day is good for you. ... Here's a way to make up for the lost hour of sleep after switching to daylight saving time — and it's not an extra large coffee. Take a nap.
https://wakeup-world.com/2016/05/26/are-humans-wired-to-sleep-twice-a-day-the-benefits-of-a-two-phase-sleep-cycle/
Based on his research, which found countless references to ‘first’ and ‘second’ sleeps, it appears that historically most people went to bed after dinner when the sun went down, slept for approximately 3-4 hours, then woke up for a couple of hours in the middle of the night, and then finally returned to sleep until dawn.
https://www.quora.com/Is-our-body-actually-designed-to-get-4-hours-of-sleep-twice-per-day-instead-of-8-hours-once
Answer (1 of 3): Is it true that the human body was designed to get 4 hours of sleep, twice a day, rather than 8 hours of sleep all at once? I read that some of our ancestors would sleep a few hours, wake up, sit together as a family and talk for a while, and then go back to sleep. Babies, of co...
https://brightside.me/wonder-people/how-i-decided-to-sleep-4-hours-a-day-to-have-time-for-everything-443010/
Leonardo da Vinci, Nikola Tesla, Salvador Dali, and many other geniuses were said to sleep from one to 4 hours a day according to the system of polyphasic sleep. In short, polyphasic sleep is cutting down the night sleep and adding a few 20- or 30-minute sleeping breaks during the day. As a result, we get a few extra days a week.
https://www.dailymail.co.uk/health/article-3642608/Should-sleeping-TWICE-day-Two-shorter-periods-slumber-suit-body-clocks-better-increase-alertness.html
They slept first for four hours, then woke for one to three hours before falling into a second four-hour sleep. This finding suggests bi-phasic sleep is a natural process with a biological basis.
https://www.webmd.com/sleep-disorders/features/what-is-segmented-sleep
Most of us sleep the same way. Collapse into bed in the late evening, then spend the next 8 hours -- if we're lucky -- dreaming and snoring until the alarm rings. But that's not how everyone does ...
https://www.reddit.com/r/Nightshift/comments/fa6564/anyone_sleep_4_hours_at_a_time_twice_a_day/
For the past few months, I was back to sleeping 7-8 hours. No i'm back to the 4 hours at a time. I hate it! 2. level 1. dheususi. 1 year ago. That's what I do! 9-1, then wake up and do my lunch for the night, eat or anything I have to do that day, then go back to sleep from 5-9. (I work 10-7:30)
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