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Old 03 Oct 17, 19:15
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Quote:
Now, the most accurate measurements to date, made by researchers at Harvard University, reveal that our natural daily rhythm is much closer to that of other living things than previously believed. The better match opens the way for experts to more effectively treat sleep problems involving night work, jet lag, Earth-orbiting astronauts, or just not being able to go to sleep and wake up on time.

By recording the daily rhythms of hormones and body temperatures in 24 healthy young and old men and women over a one-month period, the researchers conclude that our internal clocks run on a daily cycle of 24 hours, 11 minutes. “That’s slightly longer than 24 hours, but significantly shorter than past estimates of 25 hours,” says Charles Czeisler, professor of medicine at the Harvard Medical School.
Researchers previously reported a range of 13 to 65 hours, with a median of 25 hours, 12 minutes. The variation between our subjects, with a 95 percent level of confidence, was no more than plus or minus 16 minutes, a remarkably small range.”
https://news.harvard.edu/gazette/sto...-back-an-hour/
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