To get a better idea of which causes which, Lumeng and his 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 gender. It also didn’t matter how strict their parents were. 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 9.5hour 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 third grade.
“I expected we’d find that this(sleep link with obesity) was just a_bunch_of_bunk,”says Lumeng,a pediatrician. But their findings were convincing. No matter how her team looked at the link,“we couldn’t make it go away.”
1.According to the research,________.
A.9 million people in America have a weight problem
B.not enough sleep contributes to a gain in weight
【2017年高考英语一轮复习 单元总复习 新人教版选修7】相关文章:
★ 【北京专用】2014届高考英语一轮复习方案课时作业:选修8 Unit 2 Cloning
★ 【北京专用】2014届高考英语一轮复习方案课时作业:必修3 Unit 5 Canada
★ 【北京专用】2014届高考英语一轮复习方案课时作业:必修4 Unit 4 Body language
★ 【浙江专用】2014届高考英语一轮复习课时作业(十二)必修3Unit 2《Healthy eating》
★ 【外研英语,七省专用】2014《走向高考》英语一轮总复习(2016春出版)第一部分 教师讲义手册:选修七7-2
★ 四川省2016届高考英语一轮复习课时作业(29) Module 5 The Great Sports Personality 外研版必修5
★ 2014届高考英语一轮复习课时作业(二)必修1Module 2《My New Teachers》(外研版)
★ 【北京专用】2014届高考英语一轮复习方案课时作业:必修4 Unit 2 Working the land
★ 湖南省岳阳市2014高考英语一轮单项选择训练题(15)及答案
★ 【人教版】2014届高考英语一轮复习指导考点针对练:选修6 unit2《Poems》
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21