Editor’s note: This article comes from WeChat public account “Knock on the Blackboard” (ID: qiaoheiban8), author Gong Xiaoli, 36 氪 released with permission.Do not sleep at night, very tired during the day, in a sense, the quality of sleep determines the quality of life.But when there is an urgent task, we may still sacrifice sleep and work overtime to ensure work.But if you can enjoy most of the benefits of sleep in the shortest time and “charge your brain” quickly, you may be able to minimize the harm of staying up late.The latest “sleep optimization” technology is looking for a simple way to charge the brain.Research experiments around the world show that we have the potential to improve the efficiency of brain activity at night, including accelerating the speed of entering deep sleep and improving the effect of rest after entering deep sleep.It sounds like we don’t have to worry about staying up late to hurt our bodies anymore, but as far as the current products are concerned, nothing seems to be as good as sleeping in a beautiful place.”Slow down” is the rest. Why should a person sleep?This problem has always been a problem that scientists want to solve thoroughly.The British “New Scientist” magazine has reported that scientists have put forward several statements about the causes of sleep, from the superficial theory of nourishing and storing up to the complex theory involving memory processing, a comprehensive discussion of human sleep.Scientists have found that sleep can be divided into two completely different states: one is called fast wave sleep, also known as rapid eye movement sleep.Even when the eyeballs move quickly during sleep, the brain is also very active, and people dream in this period.Another state is called slow-wave sleep, which is the deepening of the first state, and people enter a deeper unconscious state.Scientists have found that the effects of fast-wave sleep and slow-wave sleep are different, and the two states alternate during sleep.Scientists agree that sleep allows the brain and cerebellum to rest.Animals need to sleep, but plants without brains do not sleep; some organs of the human body, such as the liver, do not rest.This shows that sleep is a brain-specific phenomenon, at least slow-wave sleep can make the brain repair the damage caused by free radicals.Free radicals are the products of metabolism and can damage human cells.Other organs can repair this damage by giving up and replacing damaged cells, but the brain can’t do this. It can only put people into sleep, especially slow-wave sleep, and brain tissue can use this time for “repair” work.Studies since the 1980s have shown that slow-wave sleep is essential for maintaining brain function. It can make necessary brain regions turn short-term memory into long-term memory so that we don’t forget what we have learned.For the transfer of information.What does fast wave sleep do?Some researchers have suggested that this is a “preparatory action” and a “organizing action” performed by the brain before entering slow wave sleep, and is a supplement to slow wave sleep.In this way, if we can increase the production of slow waves to help sleep, it is possible to improve our physical function during the day.Everything to get a good night’s sleep. Increasing the length of slow-wave sleep may help people get rid of the pain of sleep disorders.The report of the “2018 Chinese Sleep Index” released by the Sleep Medical Committee of the Chinese Medical Doctors Association shows that the incidence of insomnia in Chinese adults is as high as 38.2%, more than 300 million Chinese have experienced sleep disorders.Among them, post-90s face more serious sleep problems than the elderly. 84% of post-90s suffer from various types of sleep problems.Fall asleep.More than 60% of the post-90s generation belong to the “owl type” who sleeps late and gets up late, and the “hummingbird type” who sleeps late and gets up early.The report also suggests that people who suffer from chronic sleep deprivation suffer from depression, anxiety, and suicide at a risk of more than 1.4 times that of ordinary people.Increasing the length of slow-wave sleep during their limited sleep time may allow the brain more time to repair itself and reduce the harm of insufficient sleep.At the second expo held in Shanghai early last month, Nutri Air’s slow-wave sleep machine from Canada attracted the attention of many audiences.This small, cylindrical machine is about the same size as a humidifier, with a metal body and one-button activation.According to the company’s trade representative, this sleep machine is the world ’s first Nutri Sleep6 slow wave sleep machine. It is the first in the world to discover and successfully apply air-loaded electric particle fluctuations to intervene in brain waves, triggering human spontaneous slow waves and achieving slow-wave sleep steady state.The core technology has been patented in Canada and the United States, which can provide a new solution with non-drug intervention and no side effects for people who want to improve sleep quality.French startup Dreem launched a head-mounted device (priced at about 400 euros) in 2017 that promotes slow-wave sleep through auditory stimulation.During the wearer’s sleep, the device monitors brain movements and adjusts the sound simultaneously. The company says that deep sleep time can be increased by 32%.Philips also launched SmartSleep, a headset similar to the Dreem product, in 2018.According to Philips, the device can sense the electrical activity of the brain and periodically play short pulses to stimulate the slow oscillations characteristic of deep sleep.SmartSleep relies on smart software that slowly adjusts its volume over time to ensure that it provides users with the best personalized stimulation level (the device is currently only available in the United States for $ 399).”Sleep debt” sooner or later, whether it is airborne electric particle fluctuations interfering with brain waves, or acoustic pulses to stimulate slow wave regeneration, these commercial products seem to have great potential, but larger-scale research is still needed to ensure these productsEffectiveness outside the laboratory.As David White, chief scientific officer of Philips, puts it, even if you wear a sleep aid, you can’t completely replace sleep all night.They hope that by amplifying the benefits of sleep, the SmartSleep device will at least help those who have to reduce their sleep and work better in their daily lives.Does sleep optimization bring long-term benefits?This will be an interesting question in future research.Sleep is closely related to health. If you sleep poorly, your body functions will be disordered. Long-term lack of sleep will increase the risk of diabetes and even Alzheimer’s disease, or cause emotions such as confusion, frustration, and depression. But whether these new technologies can helpThe need to reduce these risks is unclear.For now, the only way to ensure that we have adequate mental and physical strength is to sleep long enough.Too little sleep will cause “sleep debt”, just like overdrafts in the bank. Eventually, the body will ask us to pay our debts.Even though we may be accustomed to compressing sleep time to schedule work, our judgment, responsiveness, and other abilities are weakened.Regardless of whether you are willing to try a device that deepens your sleep, you should try to arrange more sleep time. To improve sleep quality, increasing physical exercise is one of the methods.The sleep time required by people is greatly affected by various factors. For example, manual labor can increase the amount of sleep, especially slow wave sleep. Manual laborers can enjoy the pleasure of lying down and sleeping;It will increase fast wave sleep and dream more.As an innate skill, which at the same time accounts for almost a third of our life, we should have a sense of control over our sleep..