睡眠决定寿命 每天睡几个小时可长寿（Sleep determines life and sleeps a few hours a day for long life）.docVIP

睡眠决定寿命 每天睡几个小时可长寿（Sleep determines life and sleeps a few hours a day for long life） Sleep determines life and sleeps a few hours a day for long life One day must be 8 hours of sleep? According to the American Cancer Society, the average person who sleeps 7~8 hours per night has the longest life expectancy; 80% of people who sleep less than 4 hours a night are short lived. But Guo Xiheng, director of the center for respiratory diseases diagnosis and treatment at Beijing Chaoyang Hospital, also pointed out that the best sleeping time for different age groups is different, and should be scientifically sleep according to their age. Sleep determines life (picture: Oriental IC) People over 60: sleep 5.5~7 hours every day The old should go to bed at 12 every night, and sleep at night for 7 hours, or even 5.5 hours. Alzheimers association data show that people who sleep within 7 hours of sleep each night can age their brain for 2 years. Long term sleep more than 7 hours or lack of sleep will lead to poor attention, even Alzheimers disease, increased risk of early death. Recommendation: the most common sleep problems in the elderly are dreaming and insomnia. Dreaming is due to the deterioration of the brain function of the elderly. Insomnia is caused by the decrease of melatonin secretion in vivo, and melatonin is one of the important factors that determine sleep in vivo. Guo Xiheng suggested that night sleep quality is bad for the elderly, it is best to develop a lunch break, the time does not exceed 1 hours. Otherwise, the brain central nerve will be more inhibited, causing the brain blood flow is relatively reduced, the body metabolism slowed down, easily lead to wake up uncomfortable, or even more sleepy. 30~60 year old adult: sleeps 7 hours every day or so Adult men need 6.49 hours of sleep, women need about 7.5 hours, and should ensure that 10 in the evening to 5 in the morning, high quality sleep time.. Because at this time people reach the state of deep sleep, helps