想背单词？少吃肉！_BEC初级作文_BEC初级-查字典英语网

想背单词？少吃肉！

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。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。四个月后，动物们再次接受记忆测试。正常饮食的大鼠表现与之前一样；认知能力也一样。而高脂饮食组的表现就差得多了。接下来，两组各有一半大鼠被提供了滚轮装置。它们的饮食没有变化。这样，高脂饮食组的一半大鼠开始运动，另一半则没有运动。正常饮食组的大鼠也是同样的情况。

For the next seven weeks, the memory test was repeated weekly in all of the groups. During that time, the performance of the rats eating a high-fat diet continued to decline so long as they didn't exercise.But those animals that were running, even if they were eating lots of fat, showed notable improvements in their ability to think and remember.After seven weeks, the animals on the high-fat diet that exercised were scoring as well on the memory test as they had at the start of the experiment.Exercise, in other words, had "reversed the high-fat diet-induced cognitive decline," the study's authors concluded.That finding echoes those of another study presented last month at the Society for Neuroscience meeting. In it, researchers at Kyoto University in Japan gathered a group of mice bred to have a predisposition to developing a rodent version of Alzheimer's disease and its profound memory loss.