Going to Sleep on Time Associated with a Lower Risk of Developing Heart Disease

Top view of young woman sleeping on side in her bed at night. Beautiful girl sleeping profoundly and dreaming at home with blue blanket. High angle view of woman asleep with closed eyes.According to a new study published in the European Heart Journal – Digital Health, going to sleep between 10:00 and 11:00 PM is associated with a lower risk of developing heart disease than earlier or later bedtimes.

Previous research has investigated a link between sleep duration and cardiovascular disease, but this is one of the first to find a relationship between sleep timing and heart disease.


Study author Dr. David Plans explained, “The body has a 24-hour internal clock, called circadian rhythm, that helps regulate physical and mental functioning. While we cannot conclude causation from our study, the results suggest that early or late bedtimes may be more likely to disrupt the body clock, with adverse consequences for cardiovascular health.”

For the study, data from 88,026 individuals in the UK biobank were analyzed. The average age was 61 years, and 58% were women. Information on sleep onset and waking up time were collected over seven days from participants using a wrist accelerometer.

All participants were required to complete lifestyle, demographic, health, and physical assessments in questionnaires. They were followed up for an average of 5.7 years for any new diagnosis of cardiovascular disease, which was defined as heart failure, heart attack, chronic ischaemic heart disease, stroke, and transient ischaemic attack.

The association between cardiovascular events and sleep onset was adjusted for age, sex, sleep duration, sleep irregularity, smoking status, body mass index, diabetes, blood pressure, blood cholesterol, and socioeconomic status.

During the follow-up, 3,172 participants developed cardiovascular disease. Researchers found, the incidence was highest in those with sleep times at midnight or later and lowest in those with sleep onset from 10:00 to 10:59 PM.

Sleep Timing

Researchers believe that the study indicates that the optimum time to go to sleep is at a specific point in the body’s 24-hour cycle, and deviations could be hazardous to health. The riskiest time was after midnight because it may reduce the likelihood of the eyes seeing the morning sun, which can help reset the body clock.


When the information was analyzed by sex, the association with increased cardiovascular risk was stronger in women. Researchers believe it may be because there is a sex difference in how the endocrine system responds to a disruption in circadian rhythm.

The research team is hopeful that these findings will be confirmed in other studies so that sleep timing and basic sleep hygiene could be a low-cost way to target the risk of heart disease.

Getting a good quality night’s sleep has previously been linked to overall better physical health and mental health. For better quality sleep, try going to bed around the same time each night, turning off any electronic devices at least an hour before bedtime, and reducing caffeine intake a few hours before bedtime.

Author Bio

Sarah began her interest in nutritional healing at an early age. After going through health problems and becoming frustrated with the conventional ways doctors wanted to treat her illness (which were not working), she took it upon herself to find alternative treatments. This led her to revolutionize her own diet to help her get healthier and tackle her health problems. She began treating her illness by living a more balanced lifestyle through healthy food choices, exercise and other alternative medicine such as meditation. This total positive lifestyle change led her to earn a diploma in Nutritional Therapy from Health Sciences Academy in London, England. Today, Sarah enjoys helping others by teaching healthy lifestyle changes through her personal consultations and with her regular contributions to the Doctors Health Press. Also, passionate about following her dreams in life, Sarah moved to France and lived in Paris for over 5 years where she earned a certification in beadwork and embroidery from Lesage (an atelier owned by Chanel). She then went on to be a familiar face sitting front row and reporting from Paris Fashion Week. Sarah continues to practice some of the cultural ways of life she learned while in Europe. They enjoy their food, and take the time to relax and enjoy many of life’s little moments. These are life lessons she is glad to have brought back home with her.