British scientists analyzed studies that found the relationship between duration and quality of sleep and the risks of cardiovascular disease. Scientists reviewed data from 74 studies, which involved more than 3 million people.

As a result, it was found that a sleep duration of more than 8 hours was associated with an increased risk of cardiovascular disease. Moreover, the risks increased depending on growth in the duration of sleep. The scientists also concluded that, contrary to popular belief, sleeping longer than 7-8 hours is riskier than sleeping less than 7 hours.

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