How long is a good nap?
Contrary to popular opinion, napping isn’t for the lazy or depressed. Famous nappers have included Bill Clinton, Lance Armstrong, Leonardo da Vinci and Thomas Edison. The moral of the story: to be ultra-productive, just rest your head. You snooze, you gain. Give it a try for yourself and see if you aren’t amazed at the results!
THE NANO-NAP: 10 to 20 seconds. Sleep studies haven’t yet concluded whether there are benefits to these brief intervals, like when you nod off on someone’s shoulder on the train. THE MICRO-NAP: two to five minutes. Shown to be surprisingly effective at shedding sleepiness. THE MINI-NAP: five to 20 minutes. Increases alertness, stamina, motor learning, and motor performance. THE ORIGINAL POWER NAP: 20 minutes. Includes the benefits of the micro and the mini, but additionally improves muscle memory and clears the brain of useless built-up information, which helps with long-term memory (remembering facts, events, and names). THE LAZY MAN’S NAP: 50 to 90 minutes. Includes slow-wave plus REM sleep; good for improving perceptual processing; also when the system is flooded with human growth hormone, great for repairing bones and muscles.
Info gathered from: Ririan Project "10 Benefits of Power Napping"