Imagine you're sitting on a chair behind a desk and trying tp solve very complex mathematical equations. Trying to solve this very complex puzzle in every way possible.
Why do you feel tired after having done this for multiple hours although you are still just sitting on a chair?
It is some sort of mental drain and tiredness.
Where does this come from? You are not burning calories as if you went running 10km, yet still feel drained.
Ed ecco le risposte: