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Naps Longer than 30 Minutes Linked to Diabetes

Older people who nap longer than 30 minutes are at an increased risk for developing type 2 diabetes…. 

About 70% of the Chinese participants ages 45 and older reported that they take naps regularly in the afternoon. Impaired fasting glucose, also known as prediabetes, was found to have a positive correlation with the length of naps. As the length of naps increased, the impaired fasting glucose increased.

Patients were split into groups based on how long they napped. The groups were no napping, less than 30 minutes, 30 to 60 minutes, 60 to 90 minutes and more than 90 minutes. It was also noted that patients who took naps had higher blood pressure and cholesterol compared to patients who did not take naps.

The authors commented that the increased risk of diabetes might be because the time people took naps could be used to exercise instead. Also sleeping during the day can disrupt the body’s circadian rhythm, which can result in higher levels of stress hormone cortisol.

Practice Pearls: 
  • Impaired fasting glucose increased as naps increased in length.
  • Higher blood pressure in patients who took naps.
  • Higher cholesterol in patients who took naps.

Sleep Medicine Oct, 2013