7 hours of sleep per night may be optimal, after which the longer the sleep is, the higher the mortality rate.
A 2021 study published in the online journal of the American Medical Association revealed the relationship between sleep duration and overall mortality among adults in Japan, China, Singapore, and South Korea, with both persistent sleep deprivation and persistent oversleep leading to increased mortality. 59 is the best time to fall asleep because sleeping during this time period reduces the risk of heart disease, with people who fall asleep in the middle of the night or later at the highest risk. In men, more than 7 hours of sleep per night, such as hours, was associated with an increase in all-cause mortality by % and 43%, respectivelyLess than 5 hours of sleep was associated with a 16% increase in all-cause mortality. In women, one hour more or one hour less than seven hours per night was associated with increased all-cause mortality. In general, adults need 7-9 hours of sleep per night. Too little sleep can lead to decreased immunity, susceptibility to diseases, and accelerate the aging process;Excessive sleep time can lead to weakened body functions and increase the risk of cardiovascular and metabolic diseases.
Developing good sleep habits is essential for maintaining good health. Try to fall asleep before 22:30 at night and ensure 7-9 hours of sleep time for better health.