Understanding the Different Types of Sleep: Stages, Functions, and Health Impact
Sleep is not a uniform state but a complex cycle consisting of several distinct stages. The main types of sleep are non-REM (NREM) and REM (rapid eye movement) sleep, which alternate throughout the night in 90-minute cycles. Each stage plays a crucial role in restoring the body and mind.
Stage 1 of NREM is the lightest phase, where you drift in and out of sleep. Stage 2 involves a deeper level of relaxation, with slower heart rate and lower body temperature. Stage 3—also known as slow-wave sleep—is the most restorative, aiding in physical recovery and immune function. REM sleep, on the other hand, is essential for memory consolidation and emotional regulation.
Disruption in any of these types of sleep can lead to fatigue, cognitive impairment, and weakened immunity. Conditions like insomnia, sleep apnea, and restless leg syndrome often interfere with these stages. Traditional Chinese Medicine (TCM) recognizes these imbalances as manifestations of organ disharmony, often involving the heart, liver, and kidneys.
At Phases Chinese Medicine Clinic, we use acupuncture and herbal remedies to promote balanced sleep cycles. Whether you’re lacking deep sleep or not entering REM properly, TCM provides natural tools to support your body's natural rhythms.