Nav: Home

Finding the sweet spot of a good night's sleep: Not too long and not too short

August 26, 2018

Munich, Germany - Aug. 26, 2018: Researchers have found a sweet spot of six to eight hours sleep a night is most beneficial for heart health. More or less is detrimental. Their findings are presented today at ESC Congress 2018.1

Study author Dr Epameinondas Fountas, of the Onassis Cardiac Surgery Centre, Athens, Greece, said: "We spend one-third of our lives sleeping yet we know little about the impact of this biological need on the cardiovascular system."

The study investigated the relationship between sleep duration and cardiovascular disease using a meta-analysis, a statistical tool for combining the results of previous studies on the same topic. The meta-analysis included 11 prospective studies of more than one million adults (1,000,541) without cardiovascular disease published within the last five years.

Two groups, one with short (less than six hours) and another with long (more than eight hours) nightly sleep duration, were compared to the reference group (six to eight hours).

The researchers found that both short and long sleepers had a greater risk of developing or dying from coronary artery disease or stroke. Compared to adults who slept six to eight hours a night, short and long sleepers had 11% and 33% greater risks, respectively, of developing or dying from coronary artery disease or stroke during an average follow-up of 9.3 years.

Dr Fountas said: "Our findings suggest that too much or too little sleep may be bad for the heart. More research is needed to clarify exactly why, but we do know that sleep influences biological processes like glucose metabolism, blood pressure, and inflammation - all of which have an impact on cardiovascular disease."

A strength of the current analysis is that only prospective studies were included, noted Dr Fountas. This avoids recall bias, a source of systematic error in statistics arising from the inability of participants to accurately recall information.

Dr Fountas concluded: "Having the odd short night or lie-in is unlikely to be detrimental to health, but evidence is accumulating that prolonged nightly sleep deprivation or excessive sleeping should be avoided. The good news is that there are plenty of ways to get into the habit of getting six to eight hours a night - for example by going to bed and getting up at the same time every day, avoiding alcohol and caffeine before bed, eating healthily, and being physically active. Getting the right amount of sleep is an important part of a healthy lifestyle."
-end-


European Society of Cardiology

Related Cardiovascular Disease Articles:

Is educational attainment associated with lifetime risk of cardiovascular disease?
Men and women with the lowest education level had higher lifetime risks of cardiovascular disease than those with the highest education level, according to a new study published by JAMA Internal Medicine.
Food policies could lower US cardiovascular disease rates
New research conducted by the University of Liverpool and partners shows that food policies, such as fruit and vegetable subsidies, taxes on sugar sweetened drinks, and mass media campaigns to change dietary habits, could avert hundreds of thousands of deaths from cardiovascular disease (CVD) in the United States.
Cardiovascular disease causes one-third of deaths worldwide
Cardiovascular diseases (CVD), including heart diseases and stroke, account for one-third of deaths throughout the world, according to a new scientific study that examined every country over the past 25 years.
Kidney disease is a major cause of cardiovascular deaths
In 2013, reduced kidney function was associated with 4 percent of deaths worldwide, or 2.2 million deaths.
Cardiovascular disease costs will exceed $1 trillion by 2035
A new study projects that by 2035, cardiovascular disease, the most costly and prevalent killer, if left unchecked, will place a crushing economic and health burden on the nation's financial and health care systems.
Prescribing drugs for cardiovascular disease prevention in the UK
Drugs such as statins that have the potential to prevent strokes and other types of cardiovascular disease have not been prescribed to a large proportion of people at risk in the UK, according to a research article by Grace Turner of the University of Birmingham, Birmingham, UK and colleagues published in PLOS Medicine.
Fatty liver disease contributes to cardiovascular disease and vice versa
For the first time, researchers have shown that a bi-directional relationship exists between fatty liver disease and cardiovascular disease.
More dietary calcium may lower risk of cardiovascular disease
In older people, higher dietary calcium intake may lower the risk of cardiovascular disease, but not of stroke and fracture, new research from South Korea suggests.
Renal hemodynamics and cardiovascular function in health and disease
The SRC will focus on unpublished work that is state-of-the-art in study of cardiovascular and renal disease and hypertension.
Cardiovascular disease in adult survivors of childhood cancer
For adult survivors of childhood cancer, cardiovascular disease presents at an earlier age, is associated with substantial morbidity, and is often asymptomatic.

Related Cardiovascular Disease Reading:

Best Science Podcasts 2019

We have hand picked the best science podcasts for 2019. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.
Now Playing: TED Radio Hour

Digital Manipulation
Technology has reshaped our lives in amazing ways. But at what cost? This hour, TED speakers reveal how what we see, read, believe — even how we vote — can be manipulated by the technology we use. Guests include journalist Carole Cadwalladr, consumer advocate Finn Myrstad, writer and marketing professor Scott Galloway, behavioral designer Nir Eyal, and computer graphics researcher Doug Roble.
Now Playing: Science for the People

#530 Why Aren't We Dead Yet?
We only notice our immune systems when they aren't working properly, or when they're under attack. How does our immune system understand what bits of us are us, and what bits are invading germs and viruses? How different are human immune systems from the immune systems of other creatures? And is the immune system so often the target of sketchy medical advice? Those questions and more, this week in our conversation with author Idan Ben-Barak about his book "Why Aren't We Dead Yet?: The Survivor’s Guide to the Immune System".