A Sleep Habit May Have an Unexpected Link to Weight Loss
Summary
A study of adults with prediabetes found that earlier sleep onset was associated with greater weight loss during an eight-week lifestyle program. Sleep duration did not change significantly, and the researchers said further studies are needed to test whether shifting bedtime earlier causes weight loss.Key Facts
- The study included 196 adults ages 21 to 64 who reported sleeping fewer than six hours a night.
- Researchers from New York University and the University of Delaware published the study in Nursing Research on October 22.
- Participants joined an eight-week lifestyle program covering healthy eating, exercise and stress management; one group also received sleep guidance.
- Earlier sleep onset was associated with greater weight loss, regardless of whether participants received the sleep guidance.
- The lead researcher estimated that advancing sleep onset by one hour corresponded to about 1.3 pounds of weight loss in the study’s results.
- The sleep group shifted sleep onset by an average of about 12 minutes.
- Participants increased sleep duration by only about 10 minutes on average, and sleep duration was not linked to blood glucose levels in the study.
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