What is the reason you feel mentally drained after performing a mentally taxing activity such as sitting for a difficult exam?
In: Biology
the feeling of being mentally drained typically is the result of stress. If you were doing that same exam for fun, you probably wouldn’t experience the same feelings or at least not as bad.
ELI5 would be it’s your brains way of forcing you not to take on any more stressful things for a while. A defense mechanism.
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