A study conducted by researchers from Seoul National University found that after age 55, optimal working hours should not exceed 35 hours per week to avoid the risk of developing depression.

An analysis of data on more than 6,000 Koreans over 55 found that those who worked less than 35 hours a week had a significantly reduced risk of depression compared with those who either did not work at all or worked more.

A particularly low risk of depression was observed among study participants who not only spent a reasonable amount of time working, but also led an active social lifestyle. Those who regularly met with friends, attended clubs and circles for the elderly at least two to three times a week, demonstrated the best balance between work and personal life, reports Around the World.

The study authors emphasize that it is this harmonious balance between work and social activity that is a key element for maintaining mental health in older people.