According to a study, sleeping between 10pm and 11pm has a lower risk of heart disease than going to bed early or late. The human body has a 24-hour internal clock called the circadian rhythm, which helps regulate mental and physical functions. Although the study did not conclude the cause, the results indicate that sleeping too early or too late can disrupt the body’s clock, adversely affecting the health of the heart.
Although many analyzes have looked at the relationship between sleep duration and heart disease, the relationship between sleep duration and heart disease has not been researched. This study looked at the relationship between objective measured time of sleep in a large sample of individuals rather than self-report.
The study included 88,026 people recruited from the UK Biobank database between 2006 and 2010 with an average age of 61, and between 43 and 79 years. Sleep and waking time data were collected in 7 days using an accelerometer attached to the pulse. Individuals completed lifestyle, demographic, physical, and health questionnaires and assessments. They were then followed for a new heart diagnosis, which was classified as heart attack, stroke, stroke, transient ischemic attack, and chronic ischemic heart disease.
3,172 people developed heart disease at an average follow-up of 5.7 years. The incidence was highest in people who slept at midnight or later and was lowest in people who slept between 10:00 and 10:59.
The relationship between sleep time and the incidence of heart attack was analyzed by adjusting sleep irregularities categorized as socioeconomic status, gender, age, sleep duration, smoking status, self-reported early bird or night owl, sleeping and waking time. , BMI, blood pressure, diabetes, and blood cholesterol.
Compared to sleeping 10:00 to 10:59 at night, sleeping at midnight or later had a 25% increased risk of heart disease, sleeping 11:00 to 11 had a 12% increased risk: 59, and 24% before 10:00. The risk of falling asleep increased. Men who slept just before 10:00 pm, as well as women who were more likely to have an increased risk of heart attack, had a stronger analysis of sex.
Studies suggest that the optimal time for sleep is at a certain point in the body’s 24-hour cycle, and that deviations can be detrimental to health. The most risky time to sleep was after midnight as it could potentially reduce the chance of seeing morning light, thus resetting the body clock.
The reason for the strong link between bedtime and heart disease in women is not clear in the study. This may be due to differences between the sexes in how the endocrine system responds to circadian rhythm disturbances. Or, while there may not really be much difference in the strength of the relationship between men and women, the old age of individuals can be a confusing factor, given that the risk of heart attack for women increases after menopause.
Although the results do not show the cause, sleep time has emerged as a potential risk factor for heart health independent of sleep characteristics and other risk factors.
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