老人应在每晚12点前睡觉,晚上睡觉的时间在7~5.5小时就够了。阿尔茨海默病协会公布的数据显示,每晚睡眠限制在7小时以内的老人,大脑衰老可推迟2年。而长期睡眠超过7小时或不足5.5小时都会导致注意力变差,甚至出现老年性痴呆,增加早亡风险。晚间睡眠质量不好的老人,最好养成午休习惯,时间不要超过1小时。否则,大脑中枢神经会加深抑制,促使脑中血流量相对减少,体内代谢减慢,易导致醒来后周身不舒 The elderly should sleep before 12 o’clock every night, sleeping at night, 7 to 5.5 hours is enough. According to data released by the Alzheimer’s Association, aging of the brain can be postponed for two years in the elderly with sleep restriction of up to 7 hours per night. Long-term sleep more than 7 hours or less than 5.5 hours will lead to deterioration of attention, and even Alzheimer’s disease, increased risk of premature death. Night poor quality of sleep for the elderly, it is best to develop lunch habits, time should not exceed 1 hour. Otherwise, the central nervous system of the brain will be deepened to suppress, promote the relative decrease of blood flow in the brain, the body metabolism slows down, easily lead to wake up after the whole body is not comfortable