Let's face it we live in a society where people are working overtime in many cases just to make ends meet. But according to a report in the Annals of Internal Medicine there could be a stiff price to pay for this. Adults who work 11 hours or longer each day at a 67% higher risk of developing heart disease when compared to people who only work 7 to 8 hours per day. When you examine the study is quite clear that there is a price to pay for working extended hours. People working longer hours tend to exercise less and the work environment increase the amount of stress in a person's life. Both of these factors have been associated with an increased risk of heart disease. The study was conducted at the University of London.