Work Causes Heart Disease

People who regularly work long hours may be significantly increasing their risk of developing heart disease, the world’s biggest killer, British scientists said Monday.

Researchers said a long-term study showed that working more than 11 hours a day increased the risk of heart disease by 67 percent, compared with working a standard 7 to 8 hours a day.

They said the findings suggest that information on working hours — used alongside other factors like blood pressure, diabetes and smoking habits — could help doctors work out a patient’s risk of heart disease.

However, they also said it was not yet clear whether long working hours themselves contribute to heart disease risk, or whether they act as a “marker” of other factors that can harm heart health — like unhealthy eating habits, a lack of exercise or depression.

The study, published in the Annals of Internal Medicine journal, followed nearly 7,100 British workers for 11 years.

“Working long days is associated with a remarkable increase in risk of heart disease,” said Mika Kivimaki of Britain’s University College London, who led the research. He said it may be a “wake-up call for people who overwork themselves.”

Cardiovascular diseases such as heart attacks and strokes are the world’s largest killers, claiming around 17.1 million lives a year, according to the World Health Organization (WHO). Billions of dollars are spent every year on medical devices and drugs to treat them.

The findings of this study support previous research showing a link between working hours and heart disease.

For this study, men and women who worked full time and had no heart disease were selected, giving 7,095 participants.

The researchers collected data on heart risk factors like age, blood pressure, cholesterol, smoking and diabetes and also asked participants how many hours they worked — including work during the day and work brought home — on an average weekday.

During the 11-year study, 192 participants had heart attacks. Those who worked 11 hours or more a day were 67 percent more likely to have a heart attack than those with fewer hours.

Of course, heart disease is a multi-factorial issue, but those working more than 11 hours per day need to take even further precautions to lower their heart disease risk. Talk to your naturopathic doctor about laboratory studies that can help to identify numerous cardiovascular risk factors, so the proper steps can be taken to help prevent heart disease and stroke in the future. 

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