Taking daytime naps may help maintain brain health as we age, according to a new study. However, prior research has shown that excess napping can also be harmful.
Habitual napping was linked with larger total brain volume, which is associated with a lower risk of dementia and other diseases, according to researchers from University College London and the University of the Republic of Uruguay. On average, the difference in brain volume between nappers and non-nappers was equivalent to 2.5 to 6.5 years of aging, researchers said.
“By looking at genes set at birth, Mendelian randomisation avoids confounding factors occurring throughout life that may influence associations between napping and health outcomes,” said lead author Paz in the statement. However, such a technique can only show an association between nap and brain health, not cause and effect. In addition, researchers did not have information on nap duration, which can impact whether sleep is helpful or harmful.
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