Heavy Sleep
文章來源: 文章作者: 發布時間:2008-01-23 02:53 字體: [ ]  進入論壇
Weighing too much can damage your health, and obesity1 is a growing problem for both kids and adults around the world.

Sleep might be one answer to the problem. A new study has found that elementary school students who slept too little were more likely to gain pounds.



In the United States today, some 9 million children over the age of 6 are <a  target=obese2." src="/upimg/allimg/080123/1055280.jpg" border="0" />

In the United States today, some 9 million children over the age of 6 are obese.



Past studies have shown a link between sleeping less and weighing more, but scientists have had a tough time determining "which came first, the chicken or the egg," says Julie C. Lumeng of the University of Michigan in Ann Arbor3.

In other words, it hasn't been clear whether kids who weigh too much have trouble sleeping, or whether sleeping less leads to weight gain. Both scenarios4 seemed equally possible.

To get a better idea of which causes which, Lumeng and colleagues interviewed the parents of 785 third graders from around the United States. The parents answered questions about how well their kids slept that year. Three years later, the parents answered the same questions.

By sixth grade, 18 percent of kids involved in the study were obese. The scientists found no relationship between weight and the students' race or gender5. It also didn't matter how strict their parents were, or whether they were boys or girls. Obesity struck all of these groups equally.

Instead, sleep seemed to be the key factor. Over the 3 years of the study, the children averaged a healthy 9.5 hours of sleep a night. Some kids, however, slept a lot more--or less--than others.

For the sixth graders, every hour of sleep above the 9.5-hour average was linked to a 20 percent lower risk of being obese. Sleep appeared doubly important for the third graders. Every extra hour of sleep they got was linked to a 40 percent drop in obesity by sixth grade.

"I expected we'd find that this [sleep link with obesity] was just a bunch of bunk," says Lumeng, a pediatrician. But their findings6 were convincing. No matter how her team looked at the link, "we couldn't make it go away."—Emily Sohn



1 obesity Dv1ya     
  • One effect of overeating may be obesity.吃得過多能導致肥胖。
  • Sugar and fat can more easily lead to obesity than some other foods.糖和脂肪比其他食物更容易導致肥胖。
2 obese uvIya     
  • The old man is really obese,it can't be healthy.那位老人確實過于肥胖了,不能算是健康。
  • Being obese and lazy is dangerous to health.又胖又懶危害健康。
3 arbor fyIzz0     
  • They sat in the arbor and chatted over tea.他們坐在涼亭里,邊喝茶邊聊天。
  • You may have heard of Arbor Day at school.你可能在學校里聽過植樹節。
4 scenarios f7c7eeee199dc0ef47fe322cc223be88     
  • Further, graphite cores may be safer than non-graphite cores under some accident scenarios. 再者,根據一些事故解說,石墨堆芯可比非石墨堆芯更安全一些。 來自英漢非文學 - 環境法 - 環境法
  • Again, scenarios should make it clear which modes are acceptable to users in various contexts. 同樣,我們可以運用場景劇本來搞清楚在不同情境下哪些模式可被用戶接受。 來自About Face 3交互設計精髓
5 gender slSyD     
  • French differs from English in having gender for all nouns.法語不同于英語,所有的名詞都有性。
  • Women are sometimes denied opportunities solely because of their gender.婦女有時僅僅因為性別而無法獲得種種機會。
6 findings 4tYzV9     
n.發現物( finding的名詞復數 );調查(或研究)的結果;(陪審團的)裁決
  • It behoves us to study these findings carefully. 我們理應認真研究這些發現。
  • Their findings have been widely disseminated . 他們的研究成果已經廣為傳播。
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