People who sleep more than an hour each day are 45% more likely to develop Type 2 Diabetes. Individuals with diabetes are unable to naturally regulate their blood sugar levels. If proper treatment is not taken, this disease can lead to blindness, nerve damage, kidney failure, heart disease and premature death.
A review of existing scientific literature by Yamada Tomahide of the University of Tokyo and colleagues, covered more than 300,000 people of Asian and European origin from around the world. Naps less than 40 minutes will not result in diabetes.
Benjamin Cairns, a researcher at the Cancer Epidemiology Unit of the University of Oxford said, "It can falsely appear that their illness followed increased napping, rather than the other way around. This could mean that long naps appear to cause diabetes or other diseases, even when only the reverse is true."
