(Photo: Yonhap News)
The World Health Organization and the International Labor Organization have warned that long working hours are contributing to hundreds of thousands of premature deaths every year.
With more details, the BBC's Imogen Foulkes reports from Geneva.
The study looked at health risks for people working 55 hours a week or more and found a 35 percent higher risk of stroke and a 17 percent higher risk of heart disease.
Men are more vulnerable than women.
The Asia-Pacific, including Japan, Australia and China, is the worst affected region.
The statistics date from before the COVID-19 pandemic.
But the World Health Organization warns the trend towards longer hours is increasing, and with so many people working from home, the lines between work and free time have become dangerously blurred.
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