Is dreamless state a sign of high sleep quality?

Everyone dreams every night, and dreams account for about one-fifth of the sleep time every day. Xu Yifeng, vice president of Shanghai Mental Health Center, said that people usually go through four to six sleep cycles and dream in each cycle. This means that under normal circumstances, people will have 4 to 6 dreams every night, and they are more likely to dream when they are too tired, sick, facing difficulties or major changes, anxious and nervous.

We dream every night. The only difference is that sometimes we can achieve them and sometimes we can't. This mainly depends on whether we wake up in a certain sleep cycle and whether the sleep cycle is interrupted. Studies have found that if people wake up at the end of a certain sleep cycle, the contents of dreams are often impossible to recall, because dreams are short-term memories, and they will soon be forgotten if they are not repeated many times or transformed into long-term memories. But if the sleep cycle is interrupted and people are dreaming at this time, then the content of this dream can be remembered. So most of the dreams that people remember after waking up belong to the last dream. The so-called "one night without dreams" is just that we don't remember dreaming at night. But if you often feel "big sleep", it is a signal of poor sleep quality. If people realize that they have been dreaming at night, it means that sleep has been interrupted many times; Remember how many dreams you had, which means how many times you woke up at night. Intermittent sleep naturally makes people feel tired and weak.

However, dreaming itself will not only affect sleep, but also play a lot of positive roles in human health. Normal dream activity is one of the important factors to ensure physical vitality. Some protein and growth hormone needed by human body are synthesized during sleep. Dreaming also helps to restore and strengthen brain function, stimulate people's creative thinking and stabilize people's mental state.

Put your hand on your chest, is it really easy to have nightmares?

"Don't put your hands on your chest when you sleep." This is the advice that many parents give their children. In fact, people's sleeping environment and external stimuli will affect the quality of sleep and dreams. For example, people's lower limbs are always covered or oppressed by heavy objects after falling asleep, and they may be chased and evaded in their dreams, but they can't escape quickly or even move.

Xu Yifeng pointed out that if you put your hand on your chest all the time while sleeping, it will oppress your chest and affect the depth of breathing at night. Coupled with some psychological factors, it may have a certain impact on dreams and sleep quality.