Why thinking hard makes you tired

Published on August 11, 2022

Just like a grueling day of physical labor can leave you feeling drained, engaging in intense mental work can have the same effect. Researchers have uncovered new evidence that sheds light on why thinking hard for extended periods of time can lead to mental exhaustion. It turns out that the tiredness isn’t purely in your head, as previously believed. The brain is like a muscle that gets a strenuous workout when it’s engaged in rigorous cognitive tasks, causing fatigue and weariness. This phenomenon is backed by scientific findings, showing that the energy-demanding nature of deep thinking can deplete the brain’s resources and result in feelings of mental exhaustion. So, when you’re tackling complex problems or engaged in deep contemplation, it’s no wonder you start to feel mentally worn out! If you’re interested in delving into the fascinating details of this research, be sure to check out the full article.

It’s no surprise that hard physical labor wears you out, but what about hard mental labor? Sitting around thinking hard for hours makes one feel worn out, too. Now, researchers have new evidence to explain why this is, and, based on their findings, the reason you feel mentally exhausted (as opposed to drowsy) from intense thinking isn’t all in your head.

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