> Experts recommend that adults sleep between 7 and 9 hours a night. https://www.nhlbi.nih.gov/health/sleep/how-much-sleep https://www.nhlbi.nih.gov/health/sle

> Experts recommend that adults sleep between 7 and 9 hours a night. https://www.nhlbi.nih.gov/health/sleep/how-much-sleep https://www.nhlbi.nih.gov/health/sleep/how-much-sleep Absolutely nothing wrong with sleeping between 8 and 9 hours, you're actually exactly in the healthy range. I have the same profile : no caffeine or other stimulants, good volume of physical activity; I don't need any reminder to go to bed, I get the obvious the call by being quite tired. Discussing sleep with people, I found two types that are dominants: - people who heard "between 7 and 9 hours" and remember "8 hours" (can't say they're wrong here!) - people who heard "between 7 and 9 hours" and remember "the goal is 7 hours", and actually sleep between 5 and 7 hours