Why do you need to sleep more than 7 hours a day

(1)6 or 5 hours of sleep
(2)People who say there’s
(3)Will 5-6 hours of sleep be enough
(4)If I sleep for 5-6 hours
(5)risk of high blood pressure and diabetes
(6)15 – 2x
(7)More than 17 hours
(8)Even if it’s less than 6 hours
(9)Short sleeper without health problems
(10)1 Yongsan
(11)You need to sleep more than 9 hours during the day
(12)I’m not tired long sleepers
(13)98 needs to sleep 7-9 hours
(14)High blood pressure diabetes ↓
(15)cardiovascular disease
(16)Mortality cancer ↓
(17)98 needs 7-9 hours of sleep