Scientists have no explanation for the findings and do not know if they mean people who like a lie.in(睡懒觉)Can extend their lives by sleeping less.
Although it is a common belief that sleeping for at least eight hours a night is vital for health and well-being the six year study involving more than 1.1 million Americans older than 30 found that those who slept for 1ess than eight hours were far from doing themselves any long-term harm.
"Individuals who now average 6.5 hours of sleep a night Can be reassured that this is a safe amount of sleep. From a health standpoint.there is no reason to sleep longer," said Daniel Kripke ,a professor of psychiatry(精神病学)at the University of California,San Diego.
Dr.Kripke said, "We don't know if long sleep periods lead to death. Additional studies are needed to determine if setting your alarm clock earlier will actually improve your health."
The scientists who were funded by the American Cancer Society,found也at the best survival rates were among the men and women who slept for seven hours a night. Those who slept for eight hours were 12 per cent more likely to die during t11e six-year period of the study, when other factors such as diet and smoking were taken into account.
Even those who spent a mere five hours a night in bed lived longer than those who slept eight or more hours. However, an increasing death rate was found among those who slept for less than five hours.
Dr.Kripke said, "Previous sleep studies have indicated that both short-and long-duration(持续时间)sleep had higher mortality rates. However, none of those studies were large enough to distinguish the difference between seven and eight hours a night,until flow."
1 More than 1'1 million Americans participated in the six-year study. A Right B Wrong C Not mentioned
2 All the participants were from the state of California. A Right B Wrong C Not mentioned
3 The study shows that the longer you sleep each night,the longer you'11 live. A Right B Wrong C Not mentioned
4 The findings indicate that it is all right to sleep for 6.5 hours a night. A Right B Wrong C Not mentioned
5 Most of the participants slept for 7 hours a night during the study. A Right B Wrong C Not mentioned
6 Sleeping for less than 5 hours each night is better than sleeping for 5 hours A Right B Wrong C Not mentioned
7 The study was the first to tell the difference between 7 and 8 hours of sleep a night A Right B Wrong C Not mentioned
小编推荐:
2012年职称英语考试试题及答案汇总
2012年职称英语考试成绩查询专题
2012年中石油职称英语考试成绩查询
2012年全国职称英语考试成绩查询汇总
添加职称英语考试应用,试题免费做,课程免费听,考试答疑,考友交流,快来加入我们吧!
考试工具,免费应用助学习:
|
|
|
| 高清课程 |
---|
① 凡本网注明稿件来源为"原创"的所有文字、图片和音视频稿件,版权均属本网所有。任何媒体、网站或个人转载、链接转贴或以其他方式复制发表时必须注明"稿件来源:我考网",违者本网将依法追究责任;
② 本网部分稿件来源于网络,任何单位或个人认为我考网发布的内容可能涉嫌侵犯其合法权益,应该及时向我考网书面反馈,并提供身份证明、权属证明及详细侵权情况证明,我考网在收到上述法律文件后,将会尽快移除被控侵权内容。