I have been an afternoon napper for more than 14 years. I started napping after moving to a country where most people took a siesta. For various reasons, I just couldn’t get enough sleep during the night, so it was easy to fall asleep.
Over the years, I have tried short power naps, 60-minute naps, and occasionally 90-minute mid-afternoon sleeps. In this post, I would like to share with you how to nap for better mood, alertness, concentration, improved memory, and restoration of learning capacity. We will cover how long and when to nap for maximum benefit, how to avoid after-nap grogginess (sleep inertia), and the possible risks associated with longer naps.
As a final point, I am going to share my personal napping experience and my favorite napping hacks.
The benefits of napping are numerous
For me personally, the most important benefits are improved mood and decreased sleepiness. I just feel happier and ready to tackle my afternoon after a nap.
Napping studies have found a large number and variety of benefits of napping in all kinds of workplace and operational settings. Studies looked at drivers, commercial airliner pilots, shift workers, doctors and nurses, students, children, senior citizens…
Here is a non-exhaustive list of research-proven benefits:
- Improved cognitive performance
- Increased alertness and concentration
- Decreased reaction time
- Speed and accuracy improvement on cognitive tasks
- Better mood
- Less sleepiness and fatigue
- Significantly reduced number of driving incidents such as drifting out of one’s lane in a car simulator experiment: the number of incidents caused by drivers who had taken a 15-minute coffee nap (see below for details) was 91% less than for drivers who had just taken a break. Coffee alone reduced the number of incidents by 66%.
- In a NASA study, pilots who took naps were able to maintain their performance and reduce incidents during a demanding multi-day schedule. Pilots who weren’t allowed to nap experienced deceasing performance and a significantly larger number of incidents, including during the descent and landing.
- Significantly Improved memory and protection of learned information from interference: a study that focused on declarative learning found a 60% increased memory retention for nappers at a final test one week after initial learning, compared to learners who hadn’t napped.
- Nappers perform better at abstracting general concepts and making connections that weren’t directly learned but can be inferred from what was learned (relational memory).
- A nap can restore the capacity to learn, which otherwise deteriorates considerably with time awake.
- Performance on a creative problem solving task where subjects had to find a linking word between three seemingly unrelated words was improved by more than 40% after a 90-minute nap containing REM sleep (see below) compared to rest and naps containing only non-REM sleep.