So what has caffeine got to do with napping? Surely the last thing you want to do when you're tired is down a cup of espresso?
Several scientific studies back up the power of the coffee nap. Why does it work? A power nap helps to rid the brain of adenosine, the thing that makes us drowsy. Caffeine works because it works its way into the receptors where adenosine goes, thereby blocking it and keeping you from feeling drowsy.
Since it takes about 20 minutes for the effects of caffeine to kick in, when you lie down and let yourself relax, you start to get rid of the adenosine naturally, and by the time your alarm goes off, the caffeine is now kicking in and has less adenosine to compete with, making for one super perky afternoon.
Happy coffee napping....
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