- #1
- 7,864
- 1,602
When was the notion that most people need eight hours of sleep per day popularized? Was it a rule of thumb before there was any scientific research to support it? Did the notion arise after the widespread use of electric lighting - when people acquired an alternative to going to sleep when it became dark and getting up at sunrise?
I gather modern research had more detailed guidelines. https://www.cdc.gov/sleep/about_sleep/how_much_sleep.html
I gather modern research had more detailed guidelines. https://www.cdc.gov/sleep/about_sleep/how_much_sleep.html