Cognitive fatigue is the deterioration in the ability to effectively focus. It is primarily caused by prolonged mental work.

Avoid falling into this office-based version of hibernation by ... enough of it can have a severe impact on how we feel. From fatigue and tiredness to headaches and a lack of concentration ...

According to Josh Davis, author of new productivity book Two Awesome Hours, we're often unaware of the factors that might sap our energy and lead to mental fatigue. "Even some of the common ways ...