In a new large, prospective study, researchers found that midday napping (siestas) reduced coronary mortality by about one third among men and women. The study appears in the February 12, 2007 issue of The Archives of Internal Medicine.
The researchers, led by lead author Androniki Naska, lecturer of hygiene and epidemiology in UAMS, and senior author Dimitrios Trichopoulos, professor of cancer prevention and epidemiology at HSPH, looked at 23,681 individuals living in Greece who, at the beginning of the study, had no history of coronary heart disease, stroke or cancer. The study participants were followed for an average of 6.3 years. Siestas are common in the Mediterranean region and several Latin American countries and those countries also tend to have low mortality rates of coronary heart disease. Some prior studies had looked at the association, with conflicting results. However, this was the first large prospective study of individuals who were healthy at enrollment and the first study to control in detail for risk factors such as diet and physical activity.
The results showed that people who regularly took siestas, defined by the researchers as napping at least three times per week for an average of at least 30 minutes, had a 37% lower coronary mortality than those not taking siestas. Occasional nappers showed a statistically non-significant 12% reduction in coronary mortality. The apparent protective effect of siestas was particularly strong among working men and weaker among those not working, mainly retirees. Among working women, there were too few deaths to allow inferences.
The authors believe that an afternoon siesta in a healthy individual may act as a stress-releasing process, since there is considerable evidence that stress has both short and long term adverse effects on incidence of and mortality from coronary heart disease. The fact that the association was more evident among working men compared to retirees apparently reflects the different stress levels these subgroups have to cope with.
Trichopoulos says the public health message is clear—if you can take a midday nap, do so.
Todd Datz | EurekAlert!
Smart Data Transformation – Surfing the Big Wave
02.12.2016 | Fraunhofer-Institut für Angewandte Informationstechnik FIT
Climate change could outpace EPA Lake Champlain protections
18.11.2016 | University of Vermont
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
02.12.2016 | Medical Engineering
02.12.2016 | Agricultural and Forestry Science
02.12.2016 | Physics and Astronomy