Early Bedtime for Young Children Could Cut Obesity Risk
From VOA Learning English, this is the Health & Lifestyle report.
Getting a good night's sleep tonight could guard children against weight gain in the future.
According to a new study, putting preschoolers in bed by 8 p.m. could reduce their chances of becoming overweight or obese later in life by half. Preschoolers are children around the age of 4 or 5.
The term ‘obese' refers to calculations of your Body Mass Index, what doctors call BMI. They use a person's height, weight and age to assess their amount of body fat. BMIs help tell whether a person is underweight, normal, overweight or obese.
The World Health Organization says obesity can lead to serious long-term health problems like diabetes, heart disease and stroke.
Researchers from the Ohio State University's College of Public Health have found that young children who go to bed after 9 p.m. are twice as likely to be obese later in life. The researchers wrote their findings in The Journal of Pediatrics.
The lead author of the study is Sarah Anderson. She is an associate professor of epidemiology. She studies how diseases spread and how they can be controlled. Anderson says that, for parents, the results of the study support the importance of creating a bedtime routine.
She says that having a usual bedtime routine is something "families can do to lower their child's risk" of becoming overweight.
A usual, early bedtime, Anderson adds, "is also likely to have positive benefits on behavior and on social, emotional and cognitive development."
Researchers used data from 977 children for the study. These children are part of a larger project called the Study of Early Child Care and Youth Development. The project follows healthy babies born in 1991 in 10 U.S. cities.
The children were 4 1/2 years old when their mothers reported their usual weekday bedtime. Researchers then divided the children into three groups:
those who went to bed by 8 p.m. or earlier,
those who went to bed between 8 p.m. and 9 p.m. and
those whose bedtimes were after 9 p.m.
When these children turned 15 years old, the researchers looked at their rates of obesity. Of those with the earliest bedtimes, only one out of 10 was obese. Of those who went to bed between 8 and 9 p.m., 16 percent became obese. And out of those with the latest bedtimes, 23 percent became obese.
Anderson said putting children in bed early does not mean they will immediately fall asleep. But, she adds, it makes it "more likely that children will get the amount of sleep they need to be at their best."
But Anderson says it is important to understand that having early bedtimes may be harder for some families than others. She says that, "families have many competing demands and there are trade-offs that get made." For example, she says, if some parents work late, that can push the children's bedtimes to later in the evening.
Is childhood obesity a worldwide problem?
Obesity among children in the United States is a major health concern. About 17 percent of children and teenagers in the U.S. are considered obese. That is according to the Centers for Disease Control and Prevention.
The World Health Organization reported in 2014 that the number of overweight babies and young children worldwide had increased from 31 million in 1990 to 44 million in 2012. If that trend continues, the WHO warns, there will be 70 million obese children in the world by 2025.
I'm Anna Matteo.
1.body fat 体内脂肪
If you want to decrease body fat, you must do aerobic exercises.
2.associate professor 副教授
A lecturer was engaged as an associate professor.
3.heart disease 心脏疾病
When John was 17, he died of congenital heart disease.
4.cognitive development 认知发展
Psychologists believe this interplay helps a child's emotional and cognitive development.
1.The children were 4 1/2 years old when their mothers reported their usual weekday bedtime. Researchers then divided the children into three groups:
divided into 划分；分开
Politically, America is divided into fifty states.
Fuel delivery system can be divided into two categories.
2.Anderson said putting children in bed early does not mean they will immediately fall asleep.
fall asleep 入睡；睡着
I could not fall asleep for a long time.
With one thing and another, I could hardly fall asleep.
一项新研究显示，学龄前儿童晚上8点前睡觉的话，其未来的肥胖几率降低一半 。学龄前儿童指四、五岁年龄的儿童 。
“肥胖”一词是指计量身体质量指数，医生们称之为BMI 。通过采集身高、体重和年龄等信息来评估人体身体脂肪含量 。身体质量指数有助于判断一个人的体重过轻、正常还是肥胖 。
俄亥俄州立大学公共卫生学院的研究人员发现，晚上9点后睡觉的儿童，其未来体重肥胖的概率翻了一倍 。研究人员将研究结果发表在《儿科》杂志上 。
莎拉·安德森（Sarah Anderson）是该研究的首席作者 。她还是流行病学副教授 。她主要研究疾病的传播与控制 。安德森表示，研究证实了家长培养孩子良好睡眠习惯的重要性 。
为了进行研究，研究人员采集了977位儿童的数据 。这些儿童是《幼儿保育和青年发展研究》项目的主要参与群体 。该项目对1991年出生于美国10个不同城市的健康婴儿进行跟踪研究 。
当这些儿童15岁时，研究人员针对其肥胖率进行调查 。结果显示，8点前睡觉的儿童中，只有10%的人出现肥胖，8-9点就寝的儿童中有16%的人出现肥胖，而9点后就寝的儿童中，16%的人出现肥胖 。
安德森表示，孩子早点上床睡觉并不意味着他们很快就会入睡 。但是她补充说，这会让孩子更容易拥有良好的睡眠质量 。
安德森表示，对一些家庭来说，早睡远比其它家庭困难，意识到这一点非常重要 。她说，“有的家庭出于某些竞争需求，并做了一些权衡取舍 。”比如，有的家长工作到很晚，这可能会推迟孩子的入睡时间 。
美国儿童肥胖是一个重大的健康隐患 。美国约17%的儿童和青少年出现肥胖，该一数据出自美国疾病控制和预防中心 。
世界卫生组织2014年报告称，全球肥胖婴幼儿数量已经从1990年的2100万增长到2012年的4400万 。世卫组织警告，照这种趋势发展，2025年全球将会出现7千万名肥胖儿童 。