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New Study: Sleep Deprivation Can Cause Weight Gain

April 17, 2012 | Comments: 0 | Views: 173

Conditions such as sleep apnea that cause sleep deprivation are linked to poor concentration and memory, increased risk of diabetes, hypertension and high blood pressure, heart attacks and strokes, depression and sexual dysfunction.

Lack of sleep is now also linked to overeating, and as a result, weight gain. That information was just announced at the American Heart Association's Epidemiology and Prevention/Nutrition, Physical Activity and Metabolism 2012 conference in San Diego.

According to the study's abstract, sleep is an important regulator of metabolism and energy expenditure. When acute sleep deprivation occurs, the hormone leptin is reduced, while the hormone ghrelin is increased, promoting caloric intake, but not energy expenditure. The likely result is weight gain.

Leptin and ghrelin are appetite hormones. Leptin helps regulate hunger, appetite, and metabolism. When you have low levels of leptin in the body - perhaps due to sleep deprivation - the hormone will tell receptors in the hypothalamus of the brain, "Hey, I'm hungry, feed me." Normal healthy levels of leptin, on the other hand, will let the brain know that you've had enough and are no longer hungry.

Ghrelin is known as the hunger hormone because its job is to tell the hypothalamus when you are hungry and need to eat. That is why ghrelin levels are elevated in the body when you are hungry, and decrease after you have eaten. Ghrelin also promotes fat storage, and has been linked to the accumulation of abdominal fat.

Sleep deprivation reduces leptin which causes you to feel hungry. It also increases ghrelin, causing you to feel hungry and eat more. As a result, sleep deprivation is likely to lead to overeating and weight gain.

The Study

Virend Somers, M.D., Ph.D., professor of medicine and cardiovascular disease at the Mayo Clinic, Rochester, Minnesota and his colleagues conducted an eight night sleep test on 17 people - 11 men and six women - between the ages of 18 and 40. Eight of the subjects in the "random group" were made to sleep less than they normally do, while the other nine in the "control group" slept their normal amount of time.

All subjects were able to eat as much as they wanted throughout the testing periods, and their daily caloric intake was measured. In addition, their daily sleep times and energy expenditures were measured, and their blood was collected at the end of the test period.

The results of the test showed that the sleep deprived group who slept one hour and 20 minutes less than the control group per night, ate around 549 more calories per day than the normal sleep group. However, the sleep deprived group who ate more did not expend much more energy than the normal sleep group.

To read the study, see Insufficient Sleep Increases Caloric Intake but not Energy Expenditure.

David Volpi, M.D., P.C., F.A.C.S. is a board-certified otolaryngology surgeon with Ear, Nose and Throat practices, Otolaryngology Associates, on the Upper West Side and Upper East Side and is a staff member of the best teaching hospitals New York City. David Volpi, M.D. realized that there is a lack of information on the part of the public about the potential severity of snoring. With the need for accurate information, diagnosis and treatment so necessary, he founded Eos Sleep, formerly Manhattan Snoring and Sleep Center to be a place where snoring patients can go for total, expert treatment -- and he created this site to be a thorough information resource for the education of snoring sufferers throughout the world. For more information, visit

Source: EzineArticles
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