A 30-minute nap might leave you feeling groggy, while a 10- to 20-minute nap can boost alertness and energy, according to the Wall Street Journal's latest infographic.
From where to nap (turns out a parked car ain't a bad place to doze off) to what kind of people nap (surprisingly, it's the younger crowd), this illustration provides every siesta-related stat you've ever (or never) wondered. Make sure to check out the full WSJ report here.
Now if only we could get nap time permitted in the office ...
(Click the image below to zoom in.)