Chicago - Plenty of sleep could be a recipe for a successful diet in a randomized study in the Annals of Internal Medicine (2010, 153: 435-441) impaired sleep. the breakdown of fatty tissue. Moreover, the subjects, presumably due to an increase in the fat hormone ghrelin, hungrier.
ten overweight people (BMI 27.4), middle-aged (41 years) four weeks spent in the sleep laboratory at the University of Chicago. They underwent there is not only a strictly controlled diet. The sleeping times were determined. For two weeks they should Spend 8.5 hours in bed, in the other two weeks she had left it after only 5.5 hours.
The sleep deprivation was not without effect on the diet. Although they received during the entire period the same amount of calories (1450 kcal / day) decreased and the same amount of weight (about 3 kg in each of the two phase), the sleep deprivation prevents the desired reduction in fat tissue. It was only 0.6 kg back.
accounted for the rest of the weight loss of lean tissue. The two weeks with a long sleep had the opposite effect: The subjects in this lost time 1.4 kg of fat (more than twice as much as in the lack of sleep), while the loss of lean tissue was limited to 1.5 kg.
The statement is the opinion of the endocrinologist Plamen Penev in the fat hormone ghrelin to search, its concentration was increased by the lack of sleep from 75 to 84 ng / l. Ghrelin was not only responsible for the greater hunger - the subjects outside the controlled environment of the study are expected to have given in, while she had to endure in the hospital.
Ghrelin also reduces the oxidation of fatty acids and increased gluconeogenesis in the liver. The message is therefore Penev clear: diets should be Obese time they spend most asleep in bed.
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