A daily nap becomes ever more necessary as we get older, and yet they're also a bit of a gamble- nap for the right amount of time and your batteries are recharged, but sleep too long and you become a groggy mess.
So now you're probably wondering "how long is too long?", since nobody likes to wake up from a nap feeling groggy.
Well, according to this infographic the Wall Street Journal created a few years back the best naps are about twenty minutes or an hour and a half long, because half hour and hour long naps cause the most grogginess.
-Via Geeks Are Sexy
My two-hour afternoon nap isn't even listed. But I need it, since I only sleep 4 or 5 hours at night.
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At age 78 I find myself napping more. I call it "recharging" my batteries. I sometimes have a dream, so I must be able to get into REM.
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