You've probably had that afternoon moment when your eyelids start to feel heavy. For many older adults, a short nap on the couch is just part of the day.
A new study suggests the pattern may matter more than people think.
Older adults who napped most days or daily had a 48 percent higher risk of developing dementia over the next decade, according to new research from the Johns Hopkins Bloomberg School of Public Health.
The team followed 995 Medicare beneficiaries aged 65 and over, starting in 2013. None had dementia at baseline.
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Over roughly 10 years, their napping patterns tracked closely with who later developed the condition.
The results were published in The Journals of Gerontology: Series A.
Even short naps under 30 minutes carried a higher risk
The 48 percent figure was for those who napped most days or daily, compared with people who rarely napped. The link held after the researchers accounted for age, other health conditions, and poor sleep at night.
Two more findings stood out. Naps lasting 30 minutes or less were tied to a 40 percent higher risk. Dozing off unintentionally raised the risk by 39 percent.
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Short planned naps and the occasional nap were not linked to a higher risk in this data.
Earlier work has also looked at frequent afternoon napping and dementia risk.
Frequent napping may be a sign of brain changes rather than a cause
The study cannot say that napping causes dementia. It is observational, meaning it can show that two things move together but not that one leads to the other.
The research team suggested that frequent napping may be a marker of brain changes rather than something that triggers them. In other words, the dozing may be an early sign that something is already shifting in the brain.
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To test that idea, the team repeated the analysis after setting aside anyone diagnosed with dementia in the first five years. The link to frequent and unintentional napping stayed similar.
That pattern fits with the sleepiness showing up before the diagnosis. It does not rule napping out as a contributing factor, and the authors call for larger and longer studies.
For older adults, a new habit of dozing off during the day without meaning to is worth raising with a doctor, alongside questions about how well they are sleeping at night.
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This article is made and published by Ida-Marie Palm Varbæk, who may have used AI in the preparation.