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Deep Slow-Wave Sleep

Meaning

Deep Slow-Wave Sleep (SWS), also known as Stage N3 sleep, is the most restorative stage of Non-Rapid Eye Movement (NREM) sleep, characterized by the presence of high-amplitude, low-frequency delta waves on an electroencephalogram. This physiological state is fundamentally important for the physical and mental restoration of the body, facilitating energy replenishment and cellular repair processes. Crucially, SWS is strongly associated with the peak pulsatile release of Growth Hormone (GH), a master anabolic hormone, which supports muscle growth and fat metabolism. Insufficient SWS compromises recovery and can negatively impact overall endocrine balance.