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Slow Wave Sleep Cycle

Meaning

The Slow Wave Sleep Cycle, clinically identified as Non-Rapid Eye Movement (NREM) Stage 3 sleep, is the deepest and most physiologically restorative phase within the nocturnal sleep architecture, characterized by the dominance of high-amplitude, low-frequency delta brain waves. This critical stage is absolutely essential for profound physical repair, the consolidation of declarative memories, and the massive, pulsatile nocturnal secretion of Growth Hormone. Insufficient time spent in this cycle severely compromises metabolic regulation, immune function, and overall systemic recovery.