As adults, we increasingly find ourselves staying up late. However, a life without time constraints can gradually disrupt our daily rhythm. This is what's known as circadian rhythm sleep disorder (hereinafter referred to as rhythm disorder).
Specifically, when your bedtime shifts later and you become a night owl and a late riser, it's called delayed sleep phase syndrome.
When day and night are reversed, meaning you can't sleep at night and instead sleep during the day, completely reversing your day and night activities, this is a sleep disorder that is actually rare. However, for clarity, we will use the term "day-night reversal" in this article.
Even if you want to fix day-night reversal, it's not something you can do quickly, is it?
Therefore, this time, we will explain how to cure day-night reversal, as well as its advantages and disadvantages. If you read this article, even if you are experiencing day-night reversal, you will be able to successfully fix it!
1. Is day-night reversal truly only detrimental and worth curing?
In Japan, there are many people who work at night due to night shifts or time differences, leading to a day-night reversed lifestyle.
Among them, some may feel anxious, wondering, "Is it okay to continue living this day-night reversed life?"
What kind of impact does this day-night reversed life have?
First, let's compare the disadvantages and advantages of a day-night reversed life to understand its effects.
1-1. Disadvantages of a Day-Night Reversed Lifestyle
It is known that working at night disrupts the body's biological rhythm and affects health. This is precisely what a rhythm disorder is.
The main health effects include:
- Sleep disorders
- Gastrointestinal disorders
- Lifestyle diseases such as high blood pressure and hyperlipidemia
- Increased risk of myocardial infarction and stroke
- Increased risk of developing certain cancers (breast cancer, prostate cancer)
If you're not careful, anyone can easily fall into a habit of staying up late, going to bed late, and struggling to wake up in the morning, sleeping in. Also, some people work at night, finish work in the morning, and then sleep during the day.
However, if you go to sleep after dawn, your core body temperature and hormone secretion begin preparing for daytime activity, so you won't get deep sleep even if you get enough hours. In severe cases, you may suffer from sleep disorders, gastrointestinal problems, chronic headaches, or stiff shoulders.
Humans have a natural tendency for hormones to become active at night to repair cells. If you stay awake during this night period, cellular repair will not be sufficient. As a result, cells in the skin and hair will not be repaired, and damage will accumulate.
Consequently, aging progresses, and one's appearance also deteriorates, which is a disadvantage.
There are other disadvantages, and perhaps the biggest one is that you won't be able to align your schedule with family and friends. The majority of people in the world live on a cycle of being active during the day and sleeping at night.
Brain Sleep Coin (App & Device)
"Brain Sleep Coin" is an app and device that uses sleep research and advanced AI algorithms to find out everything that happens while you're sleeping that you wouldn't be able to notice on your own.
Brain Sleep Coin (App)
The app incorporates a proprietary algorithm based on data accumulated through sleep research, and can analyze your sleep quality in various aspects. Not only can you improve the quality of your sleep based on the analysis results, but you can also exchange the "Sleep Coins" you earn by using the app for coupons for various products and services.
The app can be downloaded for free from the link below.
Brain Sleep Coin (Device)
The device is worn around the waist while sleeping and linked to the app, it can analyze important aspects of sleep quality such as sleeping posture, number of turns, and temperature inside the bed, which could not be seen with previous sleep measurement devices, in addition to the measurement items of the app alone. The silicone clip type is easy to put on and does not come off easily, and it is soft and comfortable, so it does not cause stress while sleeping.
*You can use the app alone for free, but by linking it to a Sleep Coin (device), the number of measurement items and accuracy will increase, allowing for more accurate sleep measurements.
Feature 1: Unprecedented sleep analysis
Using a proprietary algorithm based on sleep research and the technology used in sleep research, it reveals an individual's sleep stage (depth of sleep), sleeping position, bed temperature (temperature inside the futon), and snoring, which could not be seen with previous sleep measurement devices.
Feature 2: Supports comfortable sleep and awakening
The app includes high-quality music created in collaboration with Avex, such as the sound of rain, a bonfire, the sound of waves, and gentle healing sounds that will help you sleep well. By setting the sound when you fall asleep or wake up, it will help you fall asleep smoothly and wake up comfortably. The songs you can select will be added and updated from time to time.
In addition, by analyzing your sleep stages, the alarm can be set to sound when you are in a light sleep state, reducing the chance of you being woken up during a deep sleep and helping you wake up refreshed.
Feature 3: Earn coins every time you sleep
By performing various actions in the app, including sleep measurement, you can accumulate "Sleep Coins" in the app. The accumulated "Sleep Coins" can be exchanged for discount coupons for "Brain Sleep" products, in-app music purchases, in-app lottery tickets, and other valuable coupons and services. Various product coupons and services are updated from time to time, making sleep even more fun.
Brain Sleep Pillow
Brain Sleep's flagship product, the Brain Sleep Pillow, was developed through brain and sleep research based on the theory of the best-selling book, The Stanford Method for Better Sleep. This pillow focuses on the "golden 90 minutes" that determines the quality of your sleep, and improves the quality of your sleep by cooling the brain.
Feature 1: Custom-made fit that prevents neck and shoulder pain
It features a unique three-layer structure. The top soft layer changes to fit the size and weight of your head, providing a fit that goes beyond that of a custom-made product.
In addition, the center is the softest, and the left and right sides have a "9-gradation structure" that makes it more elastic, so it fits any sleeping position, including on your back, side, or stomach. Furthermore, the wide design of 60 cm makes it easy to turn over in your sleep, improving the quality of your sleep.
Feature 2: Cools the brain and helps you sleep quickly and deeply
Cooling the brain deepens the first 90 minutes of sleep and improves the quality of sleep. It is said that if the quality of these 90 minutes is poor, the quality of sleep will be poor no matter how many hours you sleep after that. The Brain Sleep Pillow is made of woven polyethylene, and compared to other materials such as urethane and feathers that are often used in pillows, it can maintain a high heat dissipation rate even when you sleep for a long time, so it is possible to keep the temperature of the head low. You can sleep comfortably without heat or humidity disturbing your sleep.
Feature 3: Can be washed at home so it's always clean
Because it is made of woven polyethylene, dirt is unlikely to soak into the material and become difficult to remove, and dirt can be easily removed with a shower. It is recommended to clean it about once every three months, but since it can be hand washed at home, you can wash it completely when you notice dirt or odor and keep it clean at all times. The pillowcase can also be washed in the washing machine.
Furthermore, the material is resistant to dust mites and mold, making it safe for people who suffer from house dust or allergies, or who sleep with children. 
Brain Sleep Premium Float Mattress
The Brain Sleep Premium Float Mattress is a mattress that reduces stress on the body by distributing ultra-high body pressure through its nine-layer structure that firmly supports the body from multiple directions and recreates the ultimate relaxed posture advocated by NASA.
Feature 1: A new sensation of elasticity. The 9-layer hybrid resilience reduces stress on the body.
The hybrid resilience of the mattress, which supports the body three-dimensionally from all directions with countless fibers, responds optimally to the weight and area of each part of the mattress. Furthermore, the unique 9-layer structure absorbs gravity and converts it into repulsive force. It firmly supports the body and maintains the correct sleeping posture.
Feature 2: Recreates the neutral posture advocated by NASA. For ultimate relaxation
When you rest your body in space, your shoulders naturally tuck in and your legs rise. This is said to be the posture that puts the least strain on the body. This product's unique three-dimensional structure creates a floating feeling and the perfect firmness for your shoulders, hips, and legs, encouraging you to achieve the ultimate relaxed posture free from gravity.
Feature 3: Raising your legs improves circulation.
The legs are designed to be 4cm higher than the chest, which allows blood to circulate more easily to the chest.
Feature 4: Excellent breathability keeps you comfortable without trapping heat
To get a good night's sleep, it is important to maintain the temperature and humidity in your bed at an appropriate level. More than 90% of your bed is made up of air, which prevents heat and humidity from building up during sleep, creating a comfortable sleeping environment.
Feature 5: Can be washed in the shower for cleanliness.
Not only can the cover be removed and washed in the washing machine, but the mattress filling is also completely washable. The filling can be washed off in the shower and simply hung to dry after the shower.
Urethane and coil mattresses have poor breathability and tend to trap moisture and heat, which makes them susceptible to the growth of dust mites and mold. Brain Sleep mattresses are breathable, so they are less susceptible to dust mites and mold, and can be washed at any time if you notice dust or dirt in the mattress, so you can keep it clean.
Brain Sleep Comforter Perfect Warm EX
The Brain Sleep Comforter Perfect Warm EX is an extremely warm comforter that will make your winter sleep comfortable without the need for down or blankets.
Feature 1: Ultimate warmth far surpassing that of feathers
The secret is the 9-layer thermos structure that keeps the heat in. It is layered with advanced technology materials such as aluminum protector that blocks cold air, Kapok Heat EX that boasts amazing moisture absorption and heat generation power, and Recovery Insulation that reflects body heat with rare rare metals. The 9-layer structure keeps the heat in and does not let the warmth escape. It has about 120% more heat retention than goose down duvets, which are said to be of high quality among duvets.
Feature 2: The ultimate comfortable, stuffy sleep
The blanket fabric has a special fiber structure that is as close as possible to cashmere, and has a soft and smooth texture just like cashmere. Furthermore, the blanket fabric on the skin side, which we developed ourselves, is extremely comfortable, does not get stuffy, and has moisture absorbing and heat generating properties, so you will feel warm from the moment you get in.
Feature 3: Can be washed in a home washing machine
It can be washed completely and hygienically processed. It can be stored compactly during the off-season. It has stronger antibacterial properties than antibacterial agents, suppresses the growth of bacteria inside the futon, and eliminates the unpleasant odor of sweat. Moreover, it has antiviral properties to maintain the ultimate cleanliness.
Feature 4: Reduces dust generation by approximately 96%. No need to worry about house dust.
By minimizing the amount of lint generated by your futon, you can sleep peacefully every day.
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