If you didn't get enough sleep the night before, you may have less REM sleep than usual.
REM is the last stage of the sleep cycle, which lasts about 20 minutes each and is where dreams happen. At this moment, our heartbeat accelerates and the so-called “sleep paralysis” occurs, as the brain blocks motor neurons so that the body does not reproduce the movements that occur in dreams.
With this information, we can conclude that If you didn't get enough sleep the night before, you may have less REM sleep than usual.
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