This mimics the days in mid-winter, with short daylight and long nights.
At first, the participants would sleep huge stretches of time, likely making up for sleep debt that’s common among modern people.
His research found that we didn’t always sleep in one eight hour chunk.
Ok, maybe your grandparents probably slept like you. But once you go back before the 1800s, sleep starts to look a lot different.Your ancestors slept in a way that modern sleepers would find bizarre – they slept twice. The existence of our sleeping twice per night was first uncovered by Roger Ekirch, professor of History at Virginia Tech.Some were more active and would leave to visit with neighbours. Ekirch attributes the change to the advent of street lighting and eventually electric indoor light, as well as the popularity of coffee houses.Author Craig Koslofsky offers a further theory in his book .What is surprising is not that people slept in two sessions, but that the concept was so incredibly common.
Two-piece sleeping was the standard, accepted way to sleep.
For anyone who wants to learn more about this kind of sleep, I’ve linked below to two books referenced in the writing of this article, available on Amazon.
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Rather than staying up and active the usual sixteen hours per day, they would stay up only ten.
The other fourteen hours they would be in a closed, dark room, where they would rest or sleep as much as possible.
Religious manuals included special prayers to be said in the mid-sleep hours.