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Diets Are More Effective At Cutting Fat If Overweight People Get a Good Night’s Sleep

October 5, 2010: 10:17 AM EST

A U.S. study of the effect of sleep loss on the success of dieting has found that restricted sleep decreases the amount of fat lost while reducing muscle mass. Ten overweight nonsmoking men and women with a mean body mass index (BMI) of 27.4 spent 14 days on a moderate calorie-restricted diet. Groups either got 8.5 or 5.5 hours of sleep a night. The researchers found that the two groups lost about the same amount of weight during the study (6.5 pounds), but the sleep-derived group lost muscle weight, while those with a good night’s sleep lost fat. "Lack of sufficient sleep may compromise the efficacy of typical dietary interventions for weight loss and related metabolic risk reduction,” researchers concluded.

Arlet V. Nedeltcheva, MD; Jennifer M. Kilkus, MS; Jacqueline Imperial, RN; Dale A. Schoeller, PhD; and Plamen D. Penev, MD, PhD, "Insufficient Sleep Undermines Dietary Efforts to Reduce Adiposity", Annals of Internal Medicine, October 05, 2010, © American College of Physicians
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