Approfondimenti scientifici
Sleep and Power Naps
Daytime naps—often referred to as power naps—play a fundamental role in the development of newborns and infants. They are not simply moments of rest; they actively contribute to:
- Improving the child’s mood,
- Supporting learning and memory,
- Promoting more stable and regulated behavior,
- Facilitating deeper and more continuous nighttime sleep.
The number and duration of naps change as the child grows:
- 4–9 months: the power nap is often a short afternoon nap lasting approximately 30–45 minutes (i.e., one complete sleep cycle). Around 8–9 months of age, many children begin to reduce or eliminate this extra rest.
- 13–18 months: the morning nap tends to disappear gradually, while the after-lunch nap becomes more established.
- 3–5 years: the afternoon nap is the last one to be discontinued, but it remains highly beneficial as long as the child continues to show signs of tiredness.
Every stage of sleep, both daytime and nighttime, plays a specific role in a child’s cognitive and physical development. Therefore, it is important to ensure that children have sufficient opportunities to rest during the day as well. The circadian clock, located in the suprachiasmatic nucleus of the brain, coordinates physiological and behavioral functions according to a cycle of approximately 24 hours. Sunlight is a powerful synchronizer of this internal clock.
During the day, light inhibits the production of melatonin, a hormone produced by the pineal gland that promotes sleep. At night, the absence of light stimulates melatonin production, signaling to the body that it is time to rest. Cortisol, on the other hand, is a stress-related hormone that tends to be released in greater amounts in the morning, contributing to wakefulness and alertness. This regulation is crucial not only for sleep but also for several other biological functions, such as the regulation of body temperature, digestion, and metabolism. Therefore, regular exposure to natural light and maintaining a dark environment at night are important for physical and mental well-being.
When is it time to eliminate the power nap?
Some signs may indicate that a child is ready to give up the short afternoon nap:
- Consistently resists falling asleep during the day;
- No longer shows obvious signs of tiredness;
- Has difficulty falling asleep in the evening;
- Wakes up during the night and turns these awakenings into periods of active play.
In these cases, it is advisable to monitor the situation for a few days and, if the behavior persists, gradually begin to reduce the nap while maintaining a consistent and relaxing evening routine.
