Why Is Waking Up So Hard?
Many body systems, from the digestive tract to the thinking regions of your brain, rest as you sleep. Getting the motors running again can be like starting a car on a frosty morning.
When you sleep, your body cycles repeatedly through a natural rhythm of sleep stages. If you are lucky enough to wake during a good dream (during an REM stage), expect to wake energized. However, if you wake from deep, dreamless sleep (during a non-REM stage), you will probably feel groggy, starting the day with the mental vigor of a slug.
When you wake suddenly from deep sleep, rather than rising naturally (see I Slept In, So Why Do I Still Feel Sleepy?), the frontal thinking parts of your brain aren’t ready to ...
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