The secret of the perfect nap: how long it should last and what is the best time.
The ideal nap can improve concentration and reduce stress, but if it extends too long, it affects nighttime sleep. What is the key to getting the most out of it?
Taking a nap in the middle of the day is a deeply rooted custom in many cultures and, when done correctly, can offer significant health and daily performance benefits. However, its duration and the timing of the nap are determining factors for it to be truly effective.
On World Nap Day, we explore the science behind this habit and the keys to making the most of it without compromising nighttime rest.
Benefits of Napping: More Energy and Better Concentration
A nap is more than just a simple rest: its impact on health has been widely studied. According to the Sleep Foundation in the United States, sleeping for a few minutes during the day can help:
- Improve concentration and cognitive performance.
- Reduce stress and fatigue.
- Increase learning capacity and memory.
- Strengthen the immune system.
- Benefit cardiovascular health.
A NASA study determined that a nap of 26 minutes can increase alertness by 54% and improve performance by 34%. This practice is especially useful for people who work irregular hours, such as pilots, doctors, and drivers.
Additionally, research suggests that those who nap once or twice a week have a lower risk of heart attacks or strokes. In the sports field, it has been shown that athletes who incorporate naps into their routine experience improvements in endurance and reaction times.
How Long Should the Ideal Nap Last?
The duration of the nap directly influences its effects. A nap that is too short may not be sufficient, while one that is too long can lead to drowsiness and affect nighttime sleep.
Experts recommend:
- Short nap (15-30 minutes): ideal for increasing alertness and improving mood without interfering with nighttime sleep.
- Intermediate nap (40-60 minutes): can induce deep sleep, which may lead to grogginess upon waking.
- Long nap (90 minutes): allows for the completion of a sleep cycle, including the REM phase, benefiting memory consolidation.
The Centers for Disease Control and Prevention (CDC) warn that sleeping more than 60 minutes during the day can lead to "sleep inertia," a feeling of disorientation and tiredness upon waking.
What is the Best Time to Nap?
The timing of the nap is also key for it to be effective. Specialists recommend that it be taken eight hours before bedtime, that is, between 1:00 PM and 3:00 PM.
The Mistake Many People Make When Napping and How to Avoid It
This timing coincides with the phenomenon known as “post-lunch slump”, a natural decrease in energy linked to the circadian rhythm. Although many associate it with digestion, this drop in alertness levels occurs even in people who have not eaten recently.
To avoid interruptions and get the most benefit from the nap, it is recommended:
- A dark and quiet environment.
- Comfortable temperature.
- Use of earplugs or an eye mask in noisy environments.
Can Napping Be Harmful?
Despite its advantages, not all naps are advisable. Various studies have found that sleeping more than an hour during the day could be related to health problems.
Some research indicates that:
- Prolonged naps may be more frequent in people with obesity, hypertension, and sleep disorders.
- Sleeping more than 90 minutes could be linked to a higher risk of high blood pressure in middle-aged women.
- Naps longer than 60 minutes daily could increase the risk of type 2 diabetes.
- In some cases, frequent napping could be a symptom of sleep disorders such as apnea or insomnia.
According to clinical psychologist Molly Atwood from Johns Hopkins Medicine, if a person needs daily naps to remain functional, it could be a sign of a disturbance in their nighttime rest.
Sleeping Well at Night is Key
While napping can be a wellness ally, it should not become a substitute for nighttime sleep. The lack of restorative rest at night cannot be compensated for with prolonged daytime naps.
In conclusion, the secret to a good nap lies in its duration, timing, and frequency. A brief and well-timed rest can improve productivity and health, but if it extends too long, it could have negative effects. As in many aspects of life, balance is essential.