Food has a direct impact on our cognitive performance, which is why a poor decision at lunch can derail an entire afternoon.
食物对我们认知的表现有着直接的影响,这也就是为什么在午餐时作出一个糟糕的决定会让我们整个下午脱线。
Here’s a brief rundown of why this happens. Just about everything we eat is converted by our body into glucose, which provides the energy our brains need to stay alert. When we’re running low on glucose, we have a tough time staying focused and our attention drifts. This explains why it’s hard to concentrate on an empty stomach.
这里对这一现象有一个简要的解释。我们的身体会把我们吃的几乎所有东西转化成葡萄糖,而正是后者给我们大脑能量以保持活跃。当我们体内的葡萄糖含量过低的时候,我们就很难集中注意力。这也就是是为什么要把思想集中在一个空空如也的胃上面是如此的困难。
So far, so obvious. Now here’s the part we rarely consider: Not all foods are processed by our bodies at the same rate. Some foods, like pasta, bread, cereal and soda, release their glucose quickly, leading to a burst of energy followed by a slump. Others, like high fat meals (think cheeseburgers and BLTs) provide more sustained energy, but require our digestive system to work harder, reducing oxygen levels in the brain and making us groggy.
说到这儿,一切都很明白了。现在要说的是我们很少考虑到的部分:不是经过我们体内所有的食物都是以同样的比率被转化成葡萄糖。有些食物,比如说意大利面,面包,谷类食物和苏打点心等,会很快释放它们的葡萄糖,让你能量迅速增长但很快又回到低水平状态。而其他的呢,比如说高脂肪食物(肉饼啊,三明治之类)提供更加持续的能量,但是要求我们的消化系统更加努力运转,同时降低大脑中氧含量,让我们觉得昏昏沉沉。
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