How does smartwatch track sleep?

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• What are the phases of sleep?
• Why measure sleep quality?
• How and due to what smart watches track sleep?
• How accurately does the smartwatch display sleep data?/a>
• How to enable sleep monitoring in smart watch?
• What is a smart alarm in a smart watch?
• What other useful health tracking features do smartwatches offer?
• Conclusion

To maintain good health and the immune system, a person needs to follow simple rules: eat right, follow a sports regimen, drink water regularly and not overload yourself with stress. To maintain such indicators, many useful smart gadgets have been invented: smart watches, smart skipping ropes, smart scales, air humidifiers, massage pillows and other devices.

One of the key human needs is the physiological need of the body for a full and healthy sleep. Sleep is a very important part of our life, which allows you to restore the strength and energy spent during the day, including physical activity, the work of the brain, memory and the body as a whole.

If a person does not sleep for more than 48-72 hours, then failures will occur in the body, turning into problems with the nervous system, which can lead to consequences in the form of chronic fatigue.

With the advent of smart watches, more and more users began to learn about the sleep phases displayed on the smartphone screen. Human sleep is divided into two stages, which are called phases of sleep. Such phases occur during a full-fledged sleep of a person, repeating from 5 to 7 times throughout the night.

If you break off such phases with an early rise and do not go through them during the night, then the person feels tired all day, feeling unwell or apathetic. Such frequent interruptions in sleep can lead to a weakened immune system and health problems in general.

Sleep phases:

• The body relaxes and falls asleep.
  During this stage, the biological processes of the body begin to slow down and the level of sensitivity decreases. The norm of this stage of falling asleep is up to 10 minutes.
• Slow phase sleep.
  This is the longest part of the sleep phase and should take up to 75% of your rest time (80 to 90 minutes). The slow phase is responsible for the direct recovery of the body. In this phase, a person is relaxed to such a deep degree that he can very rarely remember his dreams.
• REM sleep.
  This is the short part of sleep, which, respectively, occupies 25% of the total amount of sleep. In this phase, we can observe dreams that are remembered. In the phase of short sleep, all the information received during the day is processed.

To track sleep, modern smart watches and fitness bracelets have been developed that allow everyone to do this. Many device models track and display sleep cycles, phases and quality in the form of graphs and descriptions.

Thanks to such devices, you can monitor all indicators of sleep. Smartwatches can help improve sleep quality as well as overall well-being.

Determining the quality of sleep also allows you to normalize the time of going to bed and morning awakening. Smart watches allow you to track all the detailed information, as well as wake up the user when necessary.

Smartwatches have built-in motion sensors called accelerometers. The basic principle of their work is to follow all the movements of a sleeping person. It is during slow wave sleep that a person moves more and most often in a dream. But during the fast phase, on the contrary, a person can sleep almost motionless.

Smart Watches, in addition to the built-in accelerometer, also have sensors for heart rate monitor, sound and its analysis, which is recorded during sleep. During REM sleep, a person is able to make more different sounds that smart gadgets can fix.

The smart watch also reads the pulse during a night's rest, analyzes the heart rate.

All information in an extensive form can be seen and tracked in a special mobile application for smart watches.

In a special mobile application, you can view and read some recommendations for improving sleep, as well as compare performance with the past and current month. The application also displays information about the average rest time for certain periods: a month or a year.

Smart watches do not guarantee 100% accuracy of information. Nevertheless, the data obtained can and should be trusted, because the probability of measurements is very close to accurate. With smartwatch tracking metrics, you can improve the quality of your vacation and make it more productive.

By the way, in 2018, scientists from Beijing tested six smart bracelets from various well-known manufacturers and reported that the results obtained are accurate, without significant errors.

Smart Watches are able to track the quality and quantity of sleep, as well as provide the necessary recommendations.

To activate this feature, you must:

• Connect your smart watch or fitness bracelet to your smartphone via bluetooth connection.
• Launch the appropriate mobile application.
• After pairing the smart watch with your smartphone, open the "Profile" tab.
• Select the "Smart Analysis" category.
• Activate the line "Analysis of sleep quality".

After the steps taken, you can go to bed, and the watch, in turn, will begin to record information about the state of the body.

After waking up, the mobile app will display information in the same category "Sleep quality analysis" with more detailed information.

A smart alarm clock in smartwatches is a useful feature that captures the phases of sleep and is designed to work only when the body is ready to wake up.

The alarm clock in Smart Watches is provided in almost all modern models of devices.

The features and functionality of most smartwatch models are similar to each other. This directly comes from the basic needs and wishes of users.

In Smart Watch, in addition to sleep monitoring and a smart alarm clock, there are many more useful functions: basic and additional.

The main features of a smart watch for health tracking:

• Monitor physical activity throughout the day.
• Sports modes for various workouts.
• Pedometer.
• Heart rate monitor.
• Calculation of calories burned.
• Measurement of blood pressure.
• Measurement of the level of oxygen in the blood.

Other important smart gadget features include:

• Synchronize your watch with your smartphone.
• Call and message alerts, including instant messengers and social networks.
• Geolocation, which allows you to track the route traveled on the map through the application in your smartphone.
• Various levels of protection against dust and moisture.
• Music player control.
• Smart alarm clock, calculator, stopwatch, timer, motion reminders.

The listed functions are provided both in adult and children's models of smart watches.

Modern smart watches are smart gadgets that have become indispensable assistants in the daily life of users of different ages. The device is useful for keeping active and assessing the quality of sleep.

The sleep quality assessment made by the smart watch allows you to set up the correct night rest mode, including the process of going to bed and waking up in the morning. The device is designed to transform and introduce a good habit that affects overall health, increased energy and stress resistance.