Читать книгу Super Human: The Bulletproof Plan to Age Backward and Maybe Even Live Forever онлайн
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REM/SLOW-WAVE SLEEP
When you’re sleeping, you cycle through two types of sleep each night—rapid eye movement (REM) sleep, which is when you dream, and non-REM (NREM) sleep. NREM sleep comes in three flavors: crappy (stage 1 useless light sleep), decent (stage 2 middle sleep that is still considered light sleep), and awesome (stage 3 deep delta sleep). To age or perform like a Super Human, it’s your job to spend as much time as possible in deep or slow-wave delta sleep. This is when your breathing and heart rate drop to their lowest levels and your brain waves slow down and get wider (as measured by a test called an electroencephalogram, or EEG). These slow waves are known as delta waves, and your brain produces them at a frequency of 1 to 4 hertz, a unit of measurement that is equal to one per second. To put that into context, gamma waves, the fastest brain waves, have an average frequency of above 40 hertz.
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