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Long Day Of Thinking Can Make You As Tired As Physical Work

Researchers in France say mental fatigue is a good sign you need to take a break and rest.

A study has found a long day of thinking can feel as tired as physical work.

Researchers say long periods of taxing mental activity can cause a build up of the toxic by-product glutamate in the brain.

After 6 hours concentrating on computer-based tasks, participants showed higher levels of the neurotransmitter in their pre-frontal cortex.

Researchers in France say mental fatigue is a good sign you need to take a break and rest.

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