In China, there’s a familiar saying: “Skip your noon nap, fall apart by the afternoon.”
A study published in Sleep Health gives this folk wisdom some scientific backing. Researchers analyzed data from more than 370,000 participants in the UK Biobank—average age 57—and found that people who napped regularly had larger total brain volume.
Compared with those who never napped, habitual nappers showed an average increase of 15.8 cubic centimeters in brain volume. Since brain volume naturally shrinks by 0.2–0.5 percent per year, a midday nap may leave the brain 2.6 to 6.5 years younger.
Three ways napping supports your health
Naps don’t just benefit the brain. They also offer the following health advantages:
1. Helps Rest and Rehydrate the Eyes
A short nap boosts tear production, helping keep the eyes moist and easing fatigue. Corneal temperature also rises during sleep, which promotes faster eye metabolism.
2. Supports Healthier Skin
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Skin renewal peaks during sleep. That makes a brief midday nap helpful for maintaining healthier, more resilient skin.
3. Helps Repair Immune Function
A study from the University of Florida notes that the immune system undergoes repair during sleep, and overall sleep quality plays a key role in immune regulation.
Three common questions about napping
1. What if I can’t fall asleep?
Some people simply don’t feel sleepy at midday. There’s no need to force a nap—resting with your eyes closed or listening to music is enough.
For those who already struggle with nighttime insomnia, napping is best avoided, as it may make nighttime sleep even harder.
2. What if I wake up feeling groggy?
If you feel unusually sluggish after a nap, sit still for a moment and let your body adjust before standing. If you’re still groggy, try washing your face with cool water or taking a short walk to clear your head.
3. Does a nap have to be at noon?
It’s best to nap before 3 p.m.
Napping later than that can disrupt nighttime sleep and cancel out the benefits.
Three tips for better, healthier naps
1. Keep naps short
Aim for 15–30 minutes.
Naps longer than one hour have been linked to a higher risk of cardiovascular issues. Naps exceeding 90 minutes may increase diabetes risk. Long naps can also interfere with normal nighttime sleep.
2. Don’t nap immediately after eating
Right after a meal, blood flow shifts to the digestive system. Sleeping too soon can lead to indigestion or cause dizziness and fatigue after waking. Waiting about 30 minutes is ideal.
3. Choose a suitable posture
If conditions allow, lying down is best.
For office workers or students without that option, leaning back in a chair is healthier than sleeping face-down on a desk.
A well-timed nap can offer meaningful health benefits. But poor timing or posture can turn it into a setback. With a bit of attention to how—and when—you nap, a short rest can become a simple and effective daily boost for your overall well-being.
