[健康] 快减肥！研究证实太胖真的会变傻 (双语)

　　8月4号剑桥大学发布的一项研究结果表明，过度肥胖的人到了中年以后，大脑会比同年龄身材较瘦的人衰老10岁。

　　From middle age, the brains of obese individuals show signs that it is 10 years older than those in lean individuals, according to a study revealed on August 4th by the University of Cambridge.

　　人类的大脑随着年龄的增长而不断萎缩，但是科学家进一步发现，除了年龄之外，肥胖也会加速大脑衰老。而近日一项由剑桥大学的学者发起的研究就证明了这一猜想。

　　Human brains naturally shrink with age, but scientists are increasingly recognizing that obesity may also affect the onset and progression of brain aging. Now a new study led by researchers from the University of Cambridge may provide new evidence to support this link.

　　研究团队对473名年龄处于20到87岁的成年人的数据进行了分析，并根据体重不同将数据分为两类：瘦和肥胖。他们发现偏瘦人群大脑中的白质体积与肥胖人群有着惊人的差别。肥胖人群大脑中的白质体积比偏瘦人群少很多。

　　The team studied data from 473 individuals between the ages of 20 and 87, and divided the data into two categories based on weight: lean and overweight. They found striking differences in the volume of white matter in the brains of overweight individuals, compared with those of their leaner counterparts. Overweight individuals had a widespread reduction in white matter compared to lean people.

　　白质的作用就是作为媒介联结大脑里的各个部分，从而使得大脑中的各种信息得以在不同区域之间进行交流转换。

　　White matter is the tissue that connects areas of the brain and allows for information to be communicated between regions.

　　研究团队随后还研究统计了两组实验者白质体积与年龄的关系。他们发现，过度肥胖者50岁的白质体积只相当与一个偏瘦者在60岁时的白质体积。这也就体现了为什么会说肥胖者的大脑年龄会比偏瘦人群衰老10岁。

　　The team then calculated how white matter volume related to age across the two groups. They discovered that an overweight person at, say, 50 years old had a comparable white matter volume to a lean person aged 60 years, implying a difference in brain age of 10 years.

　　但是研究者目前只局限于研究中年人的有关数据，并表示其实人在这个年龄段来说，大脑会较为脆弱。

　　But the researchers only observed these differences from middle-age onwards, suggesting that brains may be particularly vulnerable during this period of aging.

　　研究者还表明，他们需要进一步探究这一差别是否会随着体重减轻而有所改变。

　　"It will also be important to find out whether these changes could be reversible with weight loss, which may well be the case," said one of the study authors, Professor Paul Fletcher from the University of Cambridge.

　　English Source: 新华网

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