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Daytime Sleepiness Linked to Risk of Metabolic Syndrome


Do you tend to experience daytime sleepiness or require afternoon naps? If so, you may be at a higher risk of developing metabolic syndrome.

Metabolic syndrome is characterized by increased , high , excess around the waist, and abnormal or triglyceride levels. And it greatly increases your risk of heart disease, stroke and .

This makes the findings of a new study especially important. The results will be presented at the American College of Cardiology’s 65th Annual Scientific Session in April.

The study analyzed data from 21 studies and involved over 307,000 people who self-reported their daytime tiredness and napping habits.

Then, the researchers compared the responses with the participants’ history of metabolic syndrome, type 2 diabetes and .

The analysis revealed that…

  • Subjects who napped for more than 40 minutes during the day showed a sharp increase in the risk of metabolic syndrome.
  • Napping for 90 minutes appeared to increase the risk by as much as 50 percent. So did excessive daytime tiredness.
  • There was a slight decrease in risk of metabolic syndrome when participants napped for less than 30 minutes.

Previous work by the research team shows that napping for longer than one hour corresponds to a 50 percent increase in type 2 diabetes.

The authors note that, because the data is self-reported, the results may not represent the world population. However, it does indicate the need for follow-up research.

Moving forward, future research should focus on “clarifying the relationship between naps and metabolic disease,” with the hope of offering a new strategy of treatment, says lead author Tomohide Yamada, MD, PhD.



Is Daytime Napping and Sleepiness Associated With Increased Risk of Metabolic Syndrome? News Story. American College of Cardiology. Mar 2016.

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