Circadian Health Glossary
Slow-Wave Sleep
Slow-wave sleep is distinguished by its unique brain wave patterns. Through an electroencephalogram (EEG), SWS is marked by slow, high-amplitude delta waves that herald the deepest tranquility in the sleep cycle. During this stage, the heart rate, breathing, and muscle activities are significantly dropped.
Benefits of Slow-Wave Sleep
Physical Restoration
During SWS, the body undergoes intense repair. It releases growth hormones that catalyze tissue repair and regeneration. This stage is a state of cellular rejuvenation, ensuring you wake up truly refreshed.
Memory Consolidation
Beyond physical revitalization, SWS plays a pivotal role in cognitive functions, particularly in memory consolidation. Memory is enhanced during this period.
Sleep Disruptions to Slow-Wave Sleep
Interferences during the deep sleep phase can result in a feeling of grogginess and lack of refreshment. Sleep apnea, restless leg syndrome, and environmental noise can disrupt slow-wave sleep (SWS), hindering the body’s ability to enter or maintain this rejuvenating stage.
Likewise, certain medications or health issues may alter brain wave activity, degrading the quality of slow-wave sleep. Prioritizing good sleep habits, a regular schedule, and managing health issues improves SWS quality, boosting your physical and mental well-being.