Sleep amount: generally 7-9 hours \x0d\ human requirements for sleep. Generally, young adults sleep 7-9 hours a night, children increase 1-3 hours, and the elderly decrease 1-3 hours, which is the requirement of different age groups for sleep amount (time). \x0d\ Sleep quality: I can fall asleep within half an hour, basically staying up all night \x0d\ I can fall asleep within half an hour before going to bed, staying up all night or waking up once, and waking up intermittently or early; Don't dream less, don't dream more or have nightmares; Deep sleep is not like sleeping, or it is easily disturbed and awakened by the environment, which is a requirement for sleep quality. \x0d\ Optimal sleep time: 10 from night to 6: 00 am \x0d\ The optimal sleep time for human beings should be 10 from night to 6: 00 am, 9: 00 pm to 5: 00 am for the elderly and 8: 00 pm to 6: 00 am for children. \x0d\\x0d\ Best sleep time for all ages \x0d\ \ 20 hours for newborns, 0/4-15 hours for preschool children, 0/2 hours for pupils, 9 hours for middle school students, 8 hours for adults and 6-7 hours for the elderly. Strictly control the sleep time within the required range to deepen sleep; Sleeping intermittently for several hours can lead to intermittent shallow sleep. Please don't think you have to lie down for eight hours. If five hours can fully charge you, be grateful. You are a natural short-term sleeper.