The Hindu : Front Page : “Seven hours of sleep is best”

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Monday, Aug 02, 2010
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“Seven hours of sleep is best”

Washington: Six, seven or eight — so how many hours of sleep are enough for you? It's probably best to aim for seven hours of quality shut-eye every night, says a new study led by an Indian-origin researcher.

Anoop Shankar and his team at West Virginia University has found that those who sleep more or less than seven hours a day are at a raised risk of developing coronary heart disease, the Sleep journal reported.

They have based their findings on an analysis of data gathered in a national U.S. study in 2005 on 30,000 adults. The study found that the subjects who said they slept nine hours or longer a day were one-and-a-half times more likely than seven-hour sleepers to develop heart disease.

And, adults under 60 who slept five hours or fewer a night raised their risk of developing cardiovascular disease more than threefold compared to people who sleep seven hours, the study found. According to the researchers, short sleep duration is associated with angina, while both sleeping too little and too much are linked to heart attack and stroke. — PTI

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