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【科普】你真的需要七小时睡眠吗?
Yep, you do.
By Temma Ehrenfeld | Newsweek Web Exclusive
Yep, you do. Although people do vary in how much sleep they need, the differences are slight, and the vast majority of us (including seniors) need seven to eight hours. Most people who regularly get less than seven hours of rest are simply unaware of the damage that fatigue and sleepiness is doing to their bodies. Chronic "short-sleepers," as scientists call them, have forgotten what it feels like to be well-rested, says Robert Rosenberg, medical director of the Sleep Disorders Center of Prescott Valley, in Arizona.
The evidence indicates that a person who regularly sleeps less than seven hours a night functions as badly as someone who hasn't slept for one to three days, according to a research review published in the Journal of Clinical Sleep Medicine last year. Furthermore, the largest current longitudinal studies (one involving 21,268 people and another 10,308) showed that sleep-deprivation increased mortality: the chance of dying younger than people of the same age, gender and health-risk factors. In the larger study researchers at the Finnish Institute of Occupational Health assessed the sleep habits of the group in 1975 and 1981 and then checked to see who was still alive on Dec. 31, 2003. After comparing subjects' survival rates to the average for people of the same age (and adjusting for other known death risks, like smoking), the researchers concluded that lack of sleep increased mortality in the study participants by 26 percent for men and 21 percent for women. The cause of death might be accidents, or diseases exacerbated by sleep-deprivation. Other current research indicates that lack of sleep affects the body's hormones, immune system and metabolism; hence, it can be a risk factor for obesity, diabetes and heart disease.
To evaluate the quality of your own sleep—and whether you're getting enough—try these tools offered by the American Academy of Sleep Medicine
http://www.newsweek.com/id/113270?g=1 本人已认领该文编译，48小时后若未提交译文，请其他战友自由认领。 Do You Really Need Seven Hours of Sleep?
Yep, you do.
你真的需要七个小时的睡眠吗？
是的，你需要！
By Temma Ehrenfeld | Newsweek Web Exclusive
作者：Temma Ehrenfeld 来源：Newsweek Web Exclusive
Yep, you do. Although people do vary in how much sleep they need, the differences are slight, and the vast majority of us (including seniors) need seven to eight hours. Most people who regularly get less than seven hours of rest are simply unaware of the damage that fatigue and sleepiness is doing to their bodies. Chronic "short-sleepers," as scientists call them, have forgotten what it feels like to be well-rested, says Robert Rosenberg, medical director of the Sleep Disorders Center of Prescott Valley, in Arizona.
是的，你需要七小时的睡眠，。尽管不同的人需要多少睡眠有所不同，但差异很小，我们中的绝大多数人(包括年长者)都需要七至八小时的睡眠。很多经常少于七小时休息的人可能根本感觉不到疲劳和困倦对身体造成的损伤。亚利桑那州Prescott Valley睡眠障碍中心主任Robert Rosenberg说：科学家把他们称作慢性的“睡眠缺乏者”，已经忘记了得到良好休息是什么感觉。
The evidence indicates that a person who regularly sleeps less than seven hours a night functions as badly as someone who hasn't slept for one to three days, according to a research review published in the Journal of Clinical Sleep Medicine last year. Furthermore, the largest current longitudinal studies (one involving 21,268 people and another 10,308) showed that sleep-deprivation increased mortality: the chance of dying younger than people of the same age, gender and health-risk factors. In the larger study researchers at the Finnish Institute of Occupational Health assessed the sleep habits of the group in 1975 and 1981 and then checked to see who was still alive on Dec. 31, 2003. After comparing subjects' survival rates to the average for people of the same age (and adjusting for other known death risks, like smoking), the researchers concluded that lack of sleep increased mortality in the study participants by 26 percent for men and 21 percent for women. The cause of death might be accidents, or diseases exacerbated by sleep-deprivation. Other current research indicates that lack of sleep affects the body's hormones, immune system and metabolism; hence, it can be a risk factor for obesity, diabetes and heart disease.
根据去年临床睡眠医学杂志发表的一项回顾性研究，有证据表明，一个人如果经常每夜睡眠少于七个小时，身体机能可能和两至三天没有睡觉的人一样糟糕。此外，现在最大型的纵向调查（一项包括21,268人，另一项包括10,308人）表明缺乏睡眠会增加死亡率；比同年龄，性别和健康危险因素提早死亡的机会增加。在相对较大的研究中，芬兰职业健康协会的研究员评定了1975年和1981年组的睡眠习惯，然后确定在2003年12月31日仍健在的人。在比较受试者的存活率和同年龄组的平均值（根据其它已知的死亡风险，如吸烟进行调整）之后，研究人员得出结论，缺乏睡眠增加了参加这项研究受试者死亡率，男性增加26％，女性增加21％。死亡原因可能有意外事件，缺乏睡眠致疾病恶化。目前有其它研究表明缺乏睡眠影响身体的激素水平，免疫系统和新陈代谢；因此，缺乏睡眠可能是肥胖症，糖尿病和心脏病的一个危险因子。
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作者:admin@医学,生命科学 2011-05-07 05:14
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