[aasasd]

> I don’t imagine you can break a sweat just from thinking

I heard that people who were asked to do sorting tasks, i.e. just separate big oranges from small ones, got tired as heck, comparably to physical workers. Then again, dunno about sweat.

[just-ok]

Yep, mental exhaustion is undoubtedly a thing! I'd love to see how heart rates change with something like test question difficulty. Since sweat is generally a product of heat and occurs when your heart works harder during exercise, I wonder if the heart also works harder to pump the brain with more oxygen to enable it to... think harder? Obviously just musing, am no physiology expert.