I can personally attest to this. I have had insomnia since I was a child. When I spent 30 days in the desert doing survival training, after one week, I was tired about two hours after sundown and woke with the sun each morning, on my own without an alarm, and feeling more refreshed than I ever have in my life. I wish I could do it again, because it reverted as soon as I went home. It's 6am and I haven't yet been to bed from yesterday. :(
You are viewing a single comment's thread from:
That's interesting. There have been studies of sleep habits when people are moved from the modern world to where there is no electricity. Their rhythms do adjust to the time of the sunset and sunrise, though if I recall there also is a break in the middle of the night where many people wake up for one or two hours (because it's too long for some to sleep).