A variety of sleep products emerge in an endless stream, and monitoring products are also varied, some are worn on hands and some are placed under pillows. Anyway, there are various forms, but many users don't know which data of these sleep detection products are credible and which data are not. They just said how the publicity page of the merchant was publicized when buying the product, and then he believed it.

Generally speaking, these sleep products can monitor whether your body is in a deep sleep state or a shallow sleep state, which is ok. Therefore, ancient products can refer to the bracelet series of Apple and Xiaomi, which has certain sleep monitoring function, while Xiaomi's bracelet has the highest cost performance and the cheapest price, and then it can monitor heartbeat and sleep state. It is also a relatively complete function. Xiaomi 3 seems to have this function from the beginning, and Xiaomi 2 should also have it, so this shallow sleep can be monitored.

So how are this deep sleep and shallow sleep monitored? That is to say, according to the number of times a person's heart beats, you can predict the intensity of your physical activity and whether you are sleeping, because when a normal person sleeps, his breathing will appear stable and become a deep breath and a long breath. We usually breathe more frequently during physical activities, just saying that this has become an instinct of your body. You won't consciously feel your body breathing or passionate, but your body will keep a fixed rhythm when sleeping, almost unchanged.

The more serious the deep sleep, the more stable the body function, the more severe the decline of life function, and the body temperature will drop slightly during sleep. This is why people usually don't need to cover themselves with a quilt when they are indoors, but they need to cover themselves when they sleep, otherwise they will be cold. Because when you are in a deep sleep state, the intensity of physical activity will decrease, and the data such as breathing frequency, heartbeat times and body temperature will be slightly adjusted, so these monitoring instruments will be used.

This kind of sleep monitoring product is to provide a data reference, because it was mentioned in the user manual when I bought it. For reference only, it is not used as medical professional test data, because it is the standard data determined according to the changes of most people's physical condition. If you meet his standard data, you may be more accurate, but some people are abnormal, so the monitoring may not be so accurate, which is also very common.