Deep sleep, this is how you understand it

Clinically, sleep is divided into light sleep and deep sleep. Studies have shown that deep sleep is directly related to a person's sleep quality. Only deep sleep can provide good sleep quality. Let us now understand the definition of deep sleep and how to enter deep sleep.

1. Deep sleep is a part of sleep, accounting for only 25% of the total sleep time. Deep sleep is also called "golden sleep". People's nighttime sleep is generally divided into 5 to 6 repetitive cycles, and each sleep cycle lasts about 60 to 90 minutes. Based on the changes in brain waves, muscle waves and eye activities during sleep, the sleep cycle consists of non-rapid eye movement cycles and rapid eye movement cycles. Non-rapid eye movement sleep is divided into four stages: light sleep, light sleep, moderate sleep and deep sleep. Then, it enters the rapid eye movement sleep stage, which marks the end of a sleep cycle, and then continues to start the next sleep cycle.

2. Studies have shown that the shallow sleep and light sleep periods, which account for about 55% of the total sleep time, have little effect on relieving fatigue. Only the middle sleep period, deep sleep period and rapid eye movement sleep period that enter the deep sleep state can have a greater effect on relieving fatigue. Because in the deep sleep state, the cerebral cortex cells are in a state of full rest, which plays a vital role in eliminating fatigue, restoring energy, immunity and disease resistance. However, this deep sleep only accounts for 25% of the total sleep time. Therefore, when evaluating the quality of sleep, we should not only look at the time, but more importantly, the quality.

3. Improving sleep quality ultimately depends on the length of deep sleep time. In sleep science, "deep sleep" is a deep rest when your brain is not active after you fall asleep. During the night you sleep, you first enter light sleep and then naturally enter deep sleep, then light sleep again and then deep sleep again, alternating back and forth until you wake up. Deep sleep is also called "golden sleep", which is commonly referred to as "golden sleep" or "golden sleep".