According to one of the 3 authors of the study, Colin McKenzie, professor at Keio University, the level of intellectual stimulation could depend on working hours. Even though work is a double-edged sword that stimulates brain activity, working more than forty hours per week can result in stress and fatigue that may have a detrimental impact on cognitive functions.

To sum up, full-time work can have a negative impact on the brain of people aged over forty.

Read? Experts Claim that People Over 40 Shouldn’t Work More than 40 Hours per Week!