Many of us suffer from that feeling of overwhelming sleepiness during the midafternoon. It’s common, occurs whether you’ve eaten lunch or not, and is caused by a natural dip in alertness from about 1 p.m. to 3 p.m. So, if you find yourself fighting off sleep in the middle of the day and you’re somewhere where you can have a nap—do it.
Taking the time for a brief nap will relieve the sleepiness almost immediately and improve alertness for several hours after waking. And there are many other benefits too.
Why We Nap
People nap for lots of reasons, some of which are:
- to catch up on lost sleep
- in anticipation of sleep loss later on
- for enjoyment, boredom or to pass the time
Napping is relatively common. In fact, about one-third of Americans take a nap in a typical day. Napping rates are greater in countries like Greece, Brazil, and Mexico that have a culture of “siestas,” which incorporates quiet time in the early afternoon when people go home for a nap. In such countries, up to 72 percent of people will nap as often as four times per week.
The Perks of Napping
Naps are not only beneficial because they make us feel less sleepy and more alert, but because they improve our cognitive functioning, reaction times, short-term memory, and mood.
One study found that motor learning, which is where brain pathways change in response to learning a new skill, was significantly greater following a brief afternoon nap for regular nappers when compared to non-nappers.
In fact, the overall benefits of naps are similar to those experienced after consuming caffeine (or other stimulant medications) but without the side effects of caffeine dependence and disrupted sleep at night time.
How Long Should You Nap?
The amount of time you spend napping really depends on the time you have available, how you want the nap to work for you, and your plans for the coming night. Generally speaking, the longer a nap is, the longer you will feel rejuvenated after waking.
Long naps of one to two hours during the afternoon will mean you will require less sleep that night. This could mean it will take longer than usual to fall asleep.
If you are planning to stay up later than usual, or if taking longer to fall asleep at bedtime is not bothersome, time your nap for about 1.5 hours. This is the length of a normal sleep cycle. You will experience deep sleep for about an hour or so followed by light sleep for the last half an hour.
Waking up during light sleep will leave you feeling refreshed and alert. However, waking during deep sleep will not. If you sleep too long and miss the light sleep at the end of a nap, chances are you will wake up feeling sluggish and drowsy. If you do experience feeling drowsy after a nap, don’t worry—this feeling is temporary and will go away after a while.
Another option is to have a brief power nap. Brief naps of 10 to 15 minutes can significantly improve alertness, cognitive performance, and mood almost immediately after waking. The benefits typically last for a few hours.
Power naps are great because you won’t experience any sluggish or drowsy feelings after waking. This is because you do not enter any deep sleep during this brief time.
Research suggests a brief, early-to-mid-afternoon nap provides the greatest rejuvenation when compared to naps at any other time of the day. However, if you’re struggling to stay awake, a brief nap taken at any time can be help keep you alert.