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Study Shines Light On Optimum Bedtime Linked to Good Cardiovascular Health

Dec, 2021

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A new research revealed that going to sleep between 10 to 11pm is associated with lower risk of heart diseases compared to later or earlier bedtimes.

Increasing evidences show that poor sleep quality is linked with risk of cardiovascular diseases. The circadian rhythm, which is a 24-hour cycle of body, is when disrupted it affects the health of heart. A research published in the European Heart Journal on November 09, 2021 demonstrated that going to sleep in an optimum bedtime, which is between 10 to 11pm provides benefits to heart, as it lowers the risk of heart diseases such as stroke or heart attack.

There are many studies that investigated the link between circadian rhythms and cardiovascular health. These studies suggested that risk of early death from heart disease increases due to sleeping for less than six hours, and irregular bed times. The team of scientists from University of Exeter Business School used data from 88,026 subjects from UK Biobank. They followed up with the subjects after around 5.7 years in order to detect diagnoses for cardiovascular disease and it was found that total 3,172 subjected that is 3.6% developed cardiovascular disease.  The participants who sleep at midnight or later had highest incidence with 25% higher risk of cardiovascular diseases compared to those who sleep between 10 to 11pm. Subject going to sleep between 11 to 11:59pm had 12% higher risk.

Furthermore, the scientists observed that participants that dozed off before 10 pm had 24% higher risk of heart disease significantly in men and these links continued after changing sleep duration and irregularity. The team also indicates a strong link among women between increased risk of heart disease and sleep onset, however, the reason behind it still not clear. Confirming these findings in other studies could give a cost-effective public health target to reduce risk of heart disease.

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