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Slow-Wave Sleep Quality

Meaning

Slow-Wave Sleep Quality refers to the depth and continuity of the third stage of non-REM sleep, characterized by high-amplitude, low-frequency delta brain waves, which is the primary restorative phase for the body. High quality in this stage is directly correlated with peak nocturnal secretion of anabolic hormones, efficient memory consolidation, and systemic reduction in metabolic waste products. Assessing this quality, often via polysomnography or advanced HRV analysis, provides insight into the regenerative capacity of the individual. Poor SWS quality is a common precursor to endocrine fatigue.