很多人倡导睡觉要睡够8小时,事实上,睡眠时间不能一概而论,不同年龄段有对应的睡眠时长。60岁以上的老年人每晚应睡5.5~7小时,老人应在10点之前睡觉,睡眠限制在7小时以内,大脑衰老可推迟2年,而长期睡眠超过7小时或睡眠不足,都会导致注意力变差,甚至出现老年痴呆。夜间容易失 Many people advocate sleep to sleep enough 8 hours, in fact, sleep time can not be generalized, different age groups have a corresponding sleep duration. Elderly people over the age of 60 should sleep 5.5 to 7 hours per night, the elderly should sleep before 10 o’clock, sleep limits within 7 hours, brain aging can be delayed for 2 years, and long-term sleep more than 7 hours or lack of sleep will lead to attention Decreased power, and even dementia. Easily lost at night