October 17, 2011
ORLANDO, FL – New research presented at the Obesity Society earlier this month meeting adds to the growing evidence that sleep patterns are affected by weight. In this case, researchers at Northwestern University Comprehensive Center on Obesity and BodyMedia Inc, makers of body monitoring arm bands, sought to explore the relationship between BMI, sleep, and gender.
Results from the study show differences between men and women’s sleep times, and how weight can impact the amount of sleep. Previous studies have shown that getting enough sleep is critical in suppressing appetite and maintaining energy. Despite this, less than half of all Americans are aware of the link between weight and sleep, and only a fourth consider consider sleep a factor in losing weight.
Key findings:
• Although there is wide variation, there are significant differences in mean sleep time between BMI categories.
• Gender is an important factor in explaining the relationship between sleep and BMI.
• Overall, people with higher BMIs had less sleep, but the increase in weight and sleep is more closely related in women than men.
• Among adults in the BMI range of 18.5 to 40, women get 20 minutes more sleep than men on average.
• The largest difference in sleep time was seen between Class I and Class II obese groups of males, with a decline of 11 minutes for men in Class II. (Class I = BMI of 30-34.9; Class II = BMI of 35-39.9)
“This study represents an important advancement in the study of sleep and how it is impacted by a person’s weight and the different effect it has on males and females,” stated Robert F. Kushner, MD, co-investigator and clinical director of The Northwestern University’s Comprehensive Center on Obesity. “People looking to lose weight often take into account calorie consumption and physical activity levels, two very important factors; however, new research like this can play an important role in the obesity dialogue to help educate people interested in losing weight about the role of sleep.”
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