Exhaustion at work can lead to difficulty controlling emotions, scientists say

Working long hours can lead to people having issues moderating behaviour due to ego depletion', research shows

If a hard day in the office leaves you crabby and uncooperative, you may have an excuse: scientists say exercising self-restraint can exhaust parts of the brain related to decision-making and impulse control, leaving you less able to manage your behaviour towards others.

The researchers say their results tie into the theory of ego depletion" - a controversial idea in psychology that willpower is a limited resource that gets used up by effort.