8 Invisible Signs You're Totally Fried
Even though you're not obviously melting down, your burnt-out body and brain are waving the white flag.
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Even a quick catnap is enough time to have wacky, vivid dreams.
But wait (you're thinking): A short doze means I'm taking care of myself—and don't doctors recommend taking a nap as a way to get a second wind
? The problem here isn't with the siesta; it's with what happens during that time period. It usually takes about 90 minutes to enter REM sleep and start dreaming, says Christopher Winter, MD, the medical director of the Martha Jefferson Hospital Sleep Medicine Center in Charlottesville, Virginia. The maximum length of your nap should be around 30 minutes, because once you've hit REM, the nap becomes counterproductive (you'll wake up groggy instead of refreshed, Winter says). So if you start dreaming as soon as you close your eyes, it means your brain is so sleep-deprived that it's rushing to get into the REM phase. A scheduled nap can help make up for one late night
, says Winter, not a month's worth.