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WASHINGTON — An afternoon nap can be refreshing, but experts say it also can help you at work or with other activities.
Research shows that so-called power naps lasting less than 30 minutes allow the brain to rest in a way that makes you more alert.
They shouldn't be so long that you slip into a deeper sleep that would leave you groggy after waking up.
James Maas spent 48 years studying sleep as a Cornell University professor. He says you should start with 15 to 30 minutes in a dark, quiet and cool room.
Even if you don't feel like you fell asleep, you'll still get many of the benefits.
