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Bad night's sleep can hamper body's insulin use
By Kate Kelland
Published in The Saudi Gazette on 08 - 05 - 2010

Just one sleepless night can hamper the body's ability to use insulin to process sugar in the bloodstream, according to a study which scientists say might help explain why diabetes is on the rise.
Researchers said their findings suggest it may be no coincidence that while sleep duration has shortened in Western societies in the past decade there has also been an increase in cases of “insulin resistance” and adult-onset diabetes. “Our findings show a short night of sleep has more profound effects on metabolic regulation than previously appreciated,” said Esther Donga, director of Leiden University Medical Center in the Netherlands, who led the study published Wednesday.
Type 2 diabetes is caused by the body's inability to adequately use insulin, a hormone produced by the pancreas, to control glucose sugar produced from food. Sugar levels rise and can damage the eyes, kidneys, nerves, heart and major arteries. The disease, linked to poor diet and lack of exercise, is reaching epidemic levels.
Previous studies have found that several nights of poor sleep can result in impaired use of insulin, but Donga said this was the first study to examine the effects of only a single bad night's sleep.
The Dutch scientists examined nine healthy people - once after a night of eight hours sleep and once after a night of just four hours. The findings, published in the Journal of Clinical Endocrinology & Metabolism (JCEM), showed that partial sleep restriction during a single night reduced some types of insulin sensitivity by 19 to 25 percent.


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