Eight Hours Sleep Duration Linked to Cardiovascular Risk

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News study revealed that sleeping for ten hours may elevate risk of mortality by 30% as compared to sleeping for seven hours

Researchers from Keele University conducted study, which reported that individuals who sleep for more than eight hours daily are at high risk of mortality and cardiovascular disease as compared to people who sleep for seven hours or less. The study was published in Journal of the American Heart Association in August 2018.

Lead author Chung Shing Kwok and colleagues studied the link between self-reported sleep duration and quality, cardiovascular outcomes, and mortality across 74 studies including more than 3 million people. “This research began because we were interested to know if it was more harmful to sleep below or beyond the recommended sleep duration of seven to eight hours. We further wanted to know how incremental deviation from recommended sleep duration altered risk of mortality and cardiovascular risk,” said Kwok.

Results of the study showed that sleeping for ten hours accelerates the risk of death from stroke by 56% and the risk of death from cardiovascular disease by 49%. Findings of the study have important implications, as prolong sleep durations are linked to harmful outcomes. Researchers suggest that physicians should ask for more details regarding quality of sleep and duration during treatment of any clinical condition. “The important message is that abnormal sleep is a marker of elevated cardiovascular risk and greater consideration should be given in exploring both duration and sleep quality during patient consultations,” concluded Kwok.

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