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Sleep study: too much, too little can hurt heart

A woman is seen sleeping in this file photo.

March 26, 2012 12:00:00 AM PDT
A new study suggests too much or too little sleep can hurt your heart.

Researchers say people who sleep less than six hours a night are twice as likely to have a stroke or heart attack and one-and-a-half times more likely to have congestive heart failure.

People who slept more than eight hours a night were more likely to have chest pain and coronary heart disease.

The findings support several other studies recently published in the European Heart Journal.