Working more than eight hours a day raises the risk of heart disease by 80 per cent, a new major study has claimed.
Scientists found that long working hours could be condemning thousands of employees to heart attacks and strokes, the 'Daily Mail' reported.
The warning follows analysis of 12 studies dating back as far as 1958, involving a total of 22,000 people from around the world.
Researchers at the Finnish Institute of Occupational Health found that people whose working days were longer than the traditional eight hours had a 40 to 80 per cent greater chance of heart disease.
The size of the increase varied depending on how each study was carried out.
The effects were more pronounced when participants were asked how long they worked for
