以前人這樣睡覺的?

MYTH:
Waking up in the middle of the night is a sign
of a sleep disorder.

TRUTH:
Sometimes, yes. People with highly fragmented
sleep may have a sleep disorder like sleep apnea.

Waking up once in the middle of the night, however,
might be your body just doing what it was wired to do.

Before the invention of the light bulb, humans typically
woke up in the middle of the night for 1 to 3 hours.
They slept for about 4 hours after the sun went down.
Then woke up for a couple hours in the middle of the night.
Then went back to bed for another 4 before the sunrise.

Waking up once or twice during the night might just be
your body trying to revert back to the old ways.

這是叫Jeff的sleepwarrior寄給我的，但是誰管他叫Jeff?

在燈泡發明以前人們真的都這樣睡得?

在日落後就先睡個四個小時，然後半夜在醒來幾個小時，之後在日出前再睡四個小時。話說古人晚上也真的沒什麼消遣活動(謎之音:真的嗎?嘿嘿)