June 24, 2014
Science Daily/Endocrine Society
Obese adults who lose at least 5 percent of their body weight report that they sleep better and longer after six months of weight loss, according to a new study.

"This study confirms several studies reporting that weight loss is associated with increased sleep duration," said the study's lead investigator, Nasreen Alfaris, MD, MPH, a fellow in the Department of Medicine at the Perelman School of Medicine at the University of Pennsylvania, Philadelphia.

In addition, the study found that weight loss at 6 months improved sleep quality, as well as mood, regardless of how the individuals lost the weight.

Examining all three groups together, subjects who lost at least 5 percent of their weight at month 6 reported that they gained an average of 21.6 minutes of sleep a night, compared with only 1.2 minutes for those who lost less than 5 percent. Likewise, subjects who lost >5% of initial weight reported greater improvements on measures of sleep quality and mood (i.e., symptoms of depression), compared with subjects who lost <5%.
Only improvements in mood remained statistically significant at 24 months, according to Alfaris.

"Further studies are needed to examine the potential effects of weight regain in diminishing the short-term improvements of weight loss on sleep duration and sleep quality," she said.
 

Science Daily/SOURCE :http://www.sciencedaily.com/releases/2014/06/140624135755.htm