Core Viewpoint - The article discusses the potential health risks associated with falling asleep quickly, which may indicate underlying issues rather than good sleep quality. Group 1: Health Risks of Quick Sleep - Quick sleep may signal a "forced shutdown" of the body due to extreme fatigue from poor lifestyle choices, such as staying up late and getting insufficient sleep [1][2] - Conditions like narcolepsy and sleep apnea can lead to quick sleep, affecting both nighttime sleep quality and causing excessive daytime sleepiness [2][3] Group 2: Characteristics of Good Sleep - Good sleep is characterized by a complete sleep cycle, which includes 20% REM sleep and 80% NREM sleep, with each cycle lasting about 80-100 minutes [4] - A good sleep experience typically allows individuals to fall asleep within 30 minutes and achieve 6-9 hours of sleep per night [6] Group 3: Indicators of Sleep Quality - Frequent dreams or nightmares, difficulty waking up, and poor work efficiency can indicate low sleep quality [7][10][11] - High-quality sleep allows individuals to wake up feeling refreshed and ready to start the day without excessive fatigue [9] Group 4: Methods to Improve Sleep Quality - Recommendations for improving sleep include avoiding screens before bed, managing caffeine and alcohol intake, and creating a comfortable sleep environment [14] - Techniques such as deep breathing, listening to soft music, and consulting a doctor for sleep aids can also enhance sleep quality [14]