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Women who exercise in pregnancy boost the brain development of their newborn babies, according to researchers who claim the effe
Women who exercise in pregnancy boost the brain development of their newborn babies, according to researchers who claim the effe
admin
2014-09-30
39
问题
Women who exercise in pregnancy boost the brain development of their newborn babies, according to researchers who claim the effect could benefit children for the rest of their lives. Babies’ brains showed more mature patterns of activity, linked to better in later life, when their mothers took at least three 20-minute sessions of moderate exercise a week. The early stage findings are the first from a randomized controlled trial in humans to show that a pregnant mother’s exercise routine could have such an impact on her baby’s brain.
"We know exercise is good for all kinds of things in pregnancy. It makes mothers feel better, gives them more control over their weight gain, and also has an impact on their child’s weight gain in life. We’re saying here’s an added bonus, that exercise gives your child a head-start in brain development," said Elise Labonte-LeMoyne at the University of Montreal.
Women joined her study in their first trimester and were randomly assigned to either an exercise or a sedentary(久坐的)control group. The 10 women in the exercise group cycled, walked, ran or swam for three short sessions a week, pushing themselves hard enough to get only slightly out of breath. The eight women in the sedentary group were told not to exercise.
In the 8 to 12 days after the babies were born, the researchers measured their brain activity. Using a cap covered with 124 electrodes, they recorded EEG(脑电图)while they played sleeping babies a series of beeps interspersed with different sounds. Even though the babies were asleep, patterns in their brain activity showed how efficiently they could discriminate between old and novel sounds. More developed brains find the task easier than less mature ones.
"The babies born from mothers who were physically active have a more mature cerebral activation, suggesting that their brains developed more rapidly." " This is important to look at this stage in their development, because the ability to discriminate sounds is the basis of learning to speak and to understand the sounds around you," said Labonte-LeMoyne, who described the study at the Society for Neuroscience meeting in San Diego.
A 2008 Danish study found that exercising had almost no effect on the size of a woman’s baby, but reduced the risk of the baby being small or large for its gestational age(胎龄). The National Health Service(NHS)advises pregnant women to avoid contact sports, and not exercise so hard that they cannot hold a conversation. Women who were not active before becoming pregnant should start with no more than 15 minutes of continuous exercise three times a week, and slowly build up to four half-hour sessions a week.
What is the NHS’ advice on exercising for pregnant women?
选项
A、They should not contact others while exercising.
B、They should not exercise while talking.
C、They should do moderate-intensity exercises.
D、They should take exercises with more people.
答案
C
解析
细节归纳题。最后一段最后两句提到了英国国家医疗服务系统对孕期妇女锻炼的建议:杜绝身体接触类运动,锻炼强度也不应过大;没有运动习惯的妇女在孕期的锻炼应循序渐进,合理安排,可以从刚开始的每周三次每次15分钟逐渐增加至每周四次每次半小时的运动量。由此可以推断,C)正确。A)“她们不应在锻炼时联络他人”误解了原文中的contact sports(身体接触类运动),故排除;B)“她们不应在谈话时锻炼”不符合原文,故排除;D)“她们应该和更多的人一起锻炼”在原文中没有相应信息,故排除。
转载请注明原文地址:https://kaotiyun.com/show/cFm7777K
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大学英语六级
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