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Nutr Diabetes. 2012 Sep 10;2:e43. doi: 10.1038/nutd.2012.17.

Sleep duration and weight loss among overweight/obese women enrolled in a behavioral weight loss program.

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Department of Psychiatry and Human Behavior, Warren Alpert Medical School, Brown University, Providence, RI, USA.



The purpose of this study was to examine whether baseline sleep duration predicts weight loss outcomes in a randomized controlled trial examining a behavioral weight loss (BWL) intervention among overweight and obese (OW/OB) women with urinary incontinence; and whether participation in the BWL intervention is associated with changes in sleep duration.


Longitudinal, clinical intervention study of a 6-month BWL program.


Three hundred sixteen OW/OB women, with urinary incontinence (age: 30-81 years, body mass index (BMI; 25-50 kg m(-2)) enrolled from July 2004-April 2006.


Measured height and weight, self-report measures of demographics, sleep and physical activity.


Neither self-reported total sleep time (TST) nor time in bed (TIB) at baseline significantly predicted weight loss outcomes among OW/OB women in a BWL treatment. BWL treatment was successful regardless of how much subjects reported sleeping at baseline, with an average weight loss of 8.19 kg for OW/OB women receiving BWL treatment, versus a weight loss of 1.44 kg in the control condition. Similarly, changes in weight, BMI and incontinence episodes did not significantly predict changes in sleep duration or TIB across the treatment period.


Although epidemiological and cross-sectional studies support a relationship between short sleep and increased BMI, the present study found no significant relationship between TST or TIB and weight loss for OW/OB women participating in a BWL treatment.

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