Napping can be great! But sometimes when you wake up after a nap, you feel groggy, almost as if you are more tired than you were before taking the nap. Why does this happen? According to Dr. Michael Breus, “If you take it longer than 30 minutes, you end up in deep sleep. Have you ever taken a nap and felt worse when you woke up? That’s what’s happening — you’re sleeping too long and you’re going into a stage of sleep that’s very difficult to get out of.”
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Benefits of Naps
So what are the most ideal ways to nap? Napping can be seen as a quick reboot or boost for the brain. Think of when your computer is starting to perform slowly and things aren’t responding up to par, after you shut everything down and do a reboot, things are back up to speed. The brain is quite similar in that as you nap, even for very short periods of time, benefits can be seen in a number of areas.
Sleep experts suggest that taking a 10-to-20-minute power nap can give you a quick burst of alterness and mental clarity when you don’t have much time. This can be used throughout the day, late at night, before something important, or right before you are trying to beat the final boss of a video game you’ve been playing all night and you know you’ll need the extra quickness.
When I was interested in trying to maximize my time awake (which I still am, but haven’t tried much lately) I did some research into sleeping cycles and how to minimize the amount of sleep you need while still being able to function well. I ended up choosing a cycle that gave me a core sleep and then several naps throughout the day that lasted about 20 minutes. I found that after the 20 minute naps, I felt great – I was very alert, my mental clarity was high, and I was ready to go for the next 3 or 4 hours easily.
I found though, that near the beginning of my experiment with cycles, I would start to lose cognitive clarity as I got closer to the end of the day. While this was part of the transition portion of the cycle, I got to feel what it’s like when the brain just isn’t getting enough deep sleep. According to Dr. Mednick, this is where longer naps of 60 minutes or so are said to be good for increasing that cognitive power again.  Mednick also states that the 90-minute nap will likely involve a full cycle of sleep, which aids creativity and emotional and procedural memory, such as learning how to ride a bike. Waking up after REM sleep usually means a minimal amount of sleep inertia.
A study evaluating the recuperative effects of short and ultra short naps found that napping for 5-10 minutes can create a heightened sense of alertness and increase cognitive ability when compared to not taking a nap at all.
If you are looking for a quick recharge: nap for 5 – 20 minutes.
If you are looking for deeper sleep rejuvenation: nap for 60 – 90 minutes.
Final tip: When you take your shorter naps, sit up slightly, as it will allow you to avoid falling into a deeper sleep. If you dream during these power naps, it could be a sign that you are sleep deprived.
The Scientific Power of Naps:
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