A new study shows that daytime sleep can increase the volume of your brain
A new study published in Healthy sleep found a modest causal relationship between habitual sleep and a larger total volume of the brain1.
The researchers extracted data from Biobank of Great Britain2— a large dataset of over 500,000 adults aged 40 to 69. Using a method called Mendelian randomization, or MR, they analyzed the relationship between the biobank participants’ daytime sleep habits and their brain markers, such as hippocampal volume, reaction time, visual memory and total brain volume.
They found that people who reported napping during the day tended to have larger brain volumes.
Brain volume sounds a little abstract, but it is important for overall brain health. (According to one 2016 study, larger total brain volume is associated with a reduced risk of mortality3.)