Why Does Thinking Make Us So Tired?

  Intuition tells us that thinking is tiring. Indeed, it’s not difficult to come to this conclusion, since we’ve all experienced it firsthand. For instance, you only have to carry out a really demanding intellectual activity. Once you’ve started, it won’t be long before you realize how your brain loses its agility, in much the same way that your muscles tire when you exercise. A group of scientists from the Pitié-Salpêtrière University (France) conducted research to try and discover why thinking a great deal makes us tired. They concluded that there’s a point at which intellectual activity begins to produce neurotoxic…