Can Exercise Protect the Brain From Fatty Foods?

锻炼身体，防止健忘

　　In recent years, some research has suggested that a high-fat diet may be bad for the brain, at least in lab animals. Can exercise protect against such damage? That question may have particular relevance now, with the butter-and cream-laden holidays fast approaching. And it has prompted several new and important studies.

　　近年来，一些研究表明高脂饮食可能对大脑有害，至少动物实验的情况如此。那么，运动能否帮助我们抵抗这种损害呢?随着节日到来，一大波充斥着黄油和奶酪的食品正在袭来，这个问题有了特殊的重要性，由此也带来了一些新的重要实验。

　　The most captivating of these, presented last month at the annual meeting of the Society for Neuroscience in New Orleans, began with scientists at the University of Minnesota teaching a group of rats to scamper from one chamber to another when they heard a musical tone, an accepted measure of the animals' ability to learn and remember.

　　上个月，在新奥尔良神经科学学会(Society for Neuroscience in New Orleans)年会上，明尼苏达州大学(University of Minnesota)的科学家们提交了一个最为吸引人的发现：他们令一组大鼠听到音乐后从一个小室疾走到另一个小室，这是一个被普遍认可的测量动物学习和记忆能力的实验。

　　For the next four months, half of the rats ate normal chow. The others happily consumed a much greasier diet, consisting of at least 40 percent fat. Total calories were the same in both diets.

　　接下来四个月，一半的老鼠正常饮食，另一半则愉快地享用更为油腻的饮食，其中包含至少40%的脂肪。两种饮食的总卡路里量是一样的。

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