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Sleep Depth Quality

Meaning

Sleep Depth Quality is a metric that assesses the physiological intensity and restorative capacity of the sleep achieved, specifically focusing on the duration and continuity of slow-wave sleep (SWS) and REM sleep cycles. High quality is characterized by a stable, uninterrupted progression through the sleep stages, especially the deep stages, which are crucial for physical repair and cognitive consolidation. This concept moves beyond mere time in bed to evaluate the true restorative power of the sleep experience, reflecting the efficiency of the underlying neural and hormonal processes. Poor depth quality often results in waking feeling unrefreshed despite adequate sleep duration.