Are Naps Good for You? Health, Longevity, and the Best Nap Length

Short answer: Yes, a short daytime nap can improve alertness, memory, mood, and some types of cognitive performance. But daytime napping has not been shown to extend life or reliably prevent disease. For a healthy adult who wants a brief daytime reset, roughly 10–30 minutes in the early afternoon is a reasonable practical range. Habitual naps of 60 minutes or more are associated with higher mortality and cardiometabolic risk in observational studies, but those studies do not prove that long naps cause the harm.

Key finding: The evidence supports short naps mainly for short-term function, not longevity. Long naps may be a health signal rather than a health cause.

Research note: This article is based on a structured review of controlled nap experiments, systematic reviews, meta-analyses, and prospective cohort studies. We separate experimentally tested short-term effects from observational associations with long-term health and mortality.

Daytime naps: the evidence at a glance

Are naps good for you?

That depends on what “good for you” means.

If the goal is to feel more alert, improve certain memory tasks, or recover some mental performance during the day, the answer is reasonably positive. A systematic review and meta-analysis covering 60 samples from 54 studies found small-to-medium benefits of afternoon naps for overall cognition, declarative and procedural memory, vigilance, and processing speed.

But these were mainly short-term laboratory outcomes. They do not show that napping prevents cardiovascular disease, diabetes, dementia, or premature death.

This distinction is easy to lose. Feeling better after a nap is a real outcome. It is simply not the same outcome as living longer.

How long should a nap be?

There is no experimentally proven universal “best” nap duration.

Controlled studies have reported benefits after naps around 20, 30, and 45 minutes, depending on the outcome measured. One randomized study directly compared 10-, 30-, and 60-minute naps and found no clearly superior duration, although 30 minutes appeared to offer a reasonable practical trade-off.

So for an otherwise healthy adult who simply wants a daytime boost, 10–30 minutes is a sensible working range. It should be understood as a practical recommendation for short-term function, not a medical prescription and not a longevity intervention.

The evidence reviewed also supports keeping the context narrow: planned short naps in healthy adults are not the same thing as prolonged daytime sleep in people who are chronically tired, ill, sleep-deprived, or working night shifts.

Do naps help you live longer?

At present, there is no good evidence that they do.

The central problem is study design. A credible answer would ideally come from long-term trials in which people are assigned to a defined nap routine or no nap and then followed for clinical outcomes or mortality. The evidence reviewed here did not identify such trials.

Instead, most longevity evidence comes from observational cohorts. Those studies can reveal associations, but they cannot reliably tell us whether the nap itself caused the later health outcome.

This is the same causal problem that appears repeatedly in longevity research. An exposure can remain statistically associated with mortality without being the direct cause of the difference. We discuss a similar issue in our analysis of Finnish sauna and longevity data.

Why are long naps linked to higher mortality and health risk?

The long-nap signal is fairly consistent, but its meaning is not simple.

A 2024 meta-analysis of 21 cohort studies involving 371,306 people found that naps shorter than one hour were not significantly associated with higher all-cause mortality or cardiovascular disease. Naps of at least one hour were associated with approximately:

• 22% higher all-cause mortality
• 37% higher cardiovascular risk

A separate dose-response meta-analysis reported that daytime sleep of at least 60 minutes was associated with an odds ratio of 1.46 for type 2 diabetes and 1.19 for metabolic syndrome. The diabetes estimate was highly heterogeneous, which reduces confidence that one simple relationship applies across populations.

Those numbers should not be translated into “a one-hour nap raises your risk by X%.” The studies were observational and often relied on self-reported napping.

A long nap may be a symptom, not the problem

This may be the most important interpretation.

People who regularly sleep for long periods during the day may be doing so because of poor nighttime sleep, sleep apnea, depression, medication effects, chronic illness, frailty, or another cause of excessive daytime sleepiness. If sleep apnea is part of the concern, our review of mouth taping for sleep explains why simply forcing the mouth closed is not a substitute for identifying the cause.

Many cohort studies cannot cleanly separate a voluntary 20-minute restorative nap from unplanned or illness-related daytime sleep. That makes reverse causation a serious possibility: poorer health may increase the need to nap, rather than napping causing poorer health.

For example, the EPIC-Norfolk cohort followed 16,374 adults aged 40–79 for 13 years. Compared with no daytime nap, mortality hazard ratios were 1.14 for naps under one hour and 1.34 for naps of at least one hour. The study adjusted for many health and lifestyle variables, but it did not record why participants were napping.

In another cohort of 1,722 British men aged 71–92, naps longer than one hour were associated with an all-cause mortality hazard ratio of 1.62 after broad adjustment. Again, that is an association, not proof that eliminating the nap would reduce mortality.

Planned short naps and daytime sleepiness are different questions

A healthy person choosing to lie down for 20 minutes after lunch and an older adult falling asleep for two hours every afternoon because nighttime sleep is fragmented may both be classified as “nappers.” Biologically and clinically, those situations may be very different.

That distinction matters because the controlled experimental literature mostly studies planned naps and short-term function, while the mortality literature usually studies habitual self-reported daytime sleep.

If daytime sleepiness is new or persistent, the more useful question may be why you need the nap. Nighttime sleep duration and quality, medications, sleep apnea, and underlying illness deserve more attention than the nap itself. If you are looking at ways to improve nighttime sleep, see our evidence review on magnesium for sleep.

What about naps after age 60?

The evidence is less tidy in older adults.

A 2022 systematic review found that in some populations over 60, higher health risk appeared even at relatively low levels of daytime sleep. That conflicts with broader pooled analyses in which shorter naps were generally neutral.

This discrepancy could reflect differences in age, frailty, underlying disease, sleep apnea, nighttime sleep, nap purpose, or how the comparison groups were constructed. The current evidence is therefore not strong enough to support one universal nap duration for every age group.

A practical nap guide

• For a daytime alertness boost: about 10–30 minutes is a reasonable range to try.
• For longevity: no nap duration is proven to extend life.
• For long-term health: short naps have not been shown to prevent major disease.
• If you regularly sleep 60+ minutes during the day: do not assume the nap itself is harmful, but consider why you need that much daytime sleep.
• If daytime sleepiness is new, frequent, or difficult to control: it is more useful to investigate nighttime sleep, medications, sleep apnea, and possible medical causes than to treat napping as the diagnosis.

Bottom line

Short naps can be useful. They are not proven longevity medicine.

Controlled studies support short-term improvements in alertness, memory, mood, and selected cognitive outcomes. A practical nap of roughly 10–30 minutes is therefore reasonable if it helps you function better.

Habitual daytime sleep of 60 minutes or more repeatedly appears alongside higher mortality and cardiometabolic risk in observational studies. But the evidence does not establish that long naps themselves are the cause. They may instead be a marker of poor sleep or poorer health.

The cleanest current conclusion is: use short naps for short-term function if they help you; do not assume they extend life; and treat a new need for long or frequent daytime sleep as information worth investigating.

Frequently asked questions

Sources

• Systematic review and meta-analyses on the effects of afternoon napping on cognition. Sleep Medicine Reviews.
• J-curve relation between daytime nap duration and type 2 diabetes or metabolic syndrome: A dose-response meta-analysis.
• Association of night-time sleep duration and daytime napping with all-cause and cause-specific mortality in older British men.
• Daytime Napping and the Risk of All-Cause and Cause-Specific Mortality: A 13-Year Follow-up of a British Population.
• Association between self-reported napping and risk of cardiovascular disease and all-cause mortality: A meta-analysis of cohort studies.
• Daytime napping and cardiovascular risk factors, cardiovascular disease, and mortality: A systematic review.

Medical note: This article is for informational purposes and is not a substitute for individual medical advice. New or excessive daytime sleepiness can have many causes and may warrant medical evaluation.