What is a nappuccino?
How does it work?
There have been several small studies verifying the effects of coffee naps. These confirm that the benefit from combining caffeine and power naps is greater than just power napping or drinking coffee alone.
It is thought that caffeine and napping form a synergy that has a great deal to do with the organic compound adenosine. Caffeine works by blocking adenosine, and since adenosine levels are at their lowest right after a nap, this might account for the extra increase in alertness.
Optimal nap time
The recommended nap length for a nappuccino is 20 minutes. Studies have shown this to be the optimal length for a power nap, as one does not enter deep sleep, yet will still feel rested.
With power naps, overall, shorter is better. In one study, as little as six minutes of sleep (actual sleep, be mindful) was shown to have positive effects.
Naps longer than 30-minutes, on the other hand, are not desirable, as they will cause you to enter deep sleep, which will lead to a sleep hang-over unless a full sleep cycle (typically 90 minutes) is completed.