Sleeping less than seven hours on a consistent basis is linked to an increased risk for heart disease, according to a study published in the journal Sleep. Researchers followed more than 30,000 adults, all of whom were healthy at the start of the study. Researchers actually found that long and short sleep duration were associated with increased heart disease risk, even when they controlled for age, gender, race, ethnicity, smoking, alcohol intake and other risk factors. Adults who slept less than five hours a day, including naps, were more than twice as likely to develop heart disease as those who averaged seven hours a night.
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