New research shows that compared with other bedtimes, going to bed between 10pm and 11pm is associated with a lower risk of heart disease.
The study found that people who fall asleep at midnight or later have a 25% higher risk of cardiovascular disease compared to falling asleep from 10 pm to 10.59 pm.
According to this study, the risk of 11pm to 11.59pm increased by 12%, and the risk of falling asleep before 10pm increased by 24%.
Further gender analysis showed that women are more closely associated with increased cardiovascular risk, and only falling asleep before 10 o’clock in the evening is still significant for men.
Although we cannot derive a causal relationship from our research, the results indicate that going to bed early or going to bed late may be more likely to disrupt the biological clock and adversely affect cardiovascular health
Research author Dr. David Plans University of Exeter Said: “The body has a 24-hour internal clock, called the circadian rhythm, which helps to regulate physical and mental functions.
“Although we cannot derive a causal relationship from our research, the results indicate that going to bed early or late may be more likely to disrupt the biological clock and adversely affect cardiovascular health.”
The researchers said that although many studies have investigated the link between sleep duration and cardiovascular disease, the relationship between sleep duration and heart disease has not received much attention.
This study examined the association between objectively measured rather than self-reported falling asleep in a large sample of adults.
The study included 88,026 people recruited in the UK Biobank study between 2006 and 2010.
The average age is 61 years old, ranging from 43 to 79 years old, and 58% are women.
Researchers used a device worn on the wrist to collect data on sleep onset and wake-up time for more than 7 days.
Participants completed demographic, lifestyle, health and physical assessments and questionnaires.
Then they received a new diagnosis of cardiovascular disease, which was defined as heart attack, heart failure, chronic ischemic heart disease, stroke, and transient ischemic attack.
According to a study published in the European Society of Cardiology (ESC) journal “European Heart Journal-Digital Health”, 3,172 participants (3.6%) developed cardiovascular disease during an average follow-up period of 5.7 years.
According to the paper, people who sleep at midnight or later have the highest incidence, while those who fall asleep between 10 pm and 10.59 pm have the lowest incidence.
After adjusting age, gender, sleep time, irregular sleep, self-reported sleep type (early or night owl), smoking status, body mass index, diabetes, blood pressure, blood cholesterol, the researchers analyzed the relationship between falling asleep and cardiovascular events Relevance and socioeconomic status.
Dr. Plante said: “Our research shows that the best time to fall asleep is at a specific point in the body’s 24-hour cycle, and deviations may be harmful to health.
“The most dangerous time is after midnight, probably because it may reduce the likelihood of seeing the morning light, which resets the biological clock.”
He added that the reason for observing a stronger association between women’s falling asleep and cardiovascular disease is unclear.
Dr. Pulan said: “There may be gender differences in the response of the endocrine system to circadian rhythm disorders.
“Alternatively, the older age of the study participants may be a confounding factor, because postmenopausal women have an increased cardiovascular risk-meaning that there may be no difference in the strength of the association between women and men.”
He concluded: “Although the results of the study did not show a causal relationship, sleep duration has become a potential cardiac risk factor-independent of other risk factors and sleep characteristics.
“If our findings are confirmed in other studies, sleep time and basic sleep hygiene may be low-cost public health goals for reducing the risk of heart disease.”
Regina Giblin, Senior Heart Nurse British Heart Foundation Said: “This large study shows that going to bed between 10pm and 11pm may be the best time for most people to maintain a healthy heart for the long term.
“However, it is important to remember that this study can only show associations, not causation.
“More research is needed on sleep duration and duration as risk factors for heart and circulatory diseases.
“Adequate sleep is important to our overall health and the health of our heart and circulatory system. Most adults should aim for seven to nine hours of sleep each night.”
