we often seek food after focused mental activity, like preparing for an exam or poring overspreadsheets.
researchers speculate that heavy bouts of thinking drain energy from the brain, whosecapacity to store fuel is very limited.
so the brain, sensing that it may soon require more calories to keep going, apparentlystimulates bodily hunger, and even though there has been little in the way of physicalmovement or caloric expenditure, we eat.
we only looked at lunch, hunter says; the researchers do not know if the runners consumedextra calories at dinner.
they also cannot tell whether other types of exercise would have the same effect as running,although hunter says they suspect that if an activity causes someone to break into a sweat, itshould also increase blood sugar and lactate, feeding the brain and weakening hunger’s call. 他们也不知道其他哪些运动会收到和跑步一样的效果，不过亨特说，他们猜测，如果一项运动能让人出汗，那么它应该也能增加血糖和乳酸盐释放，给大脑提供养分，从而缓解饥饿感。