Evie Summers
The Samsung Galaxy Watch Active2 is a smartwatch that can track your sleep patterns and provide insights into your sleep quality. It uses a combination of sensors, including an accelerometer and a heart rate monitor, to detect when you fall asleep and track your movements throughout the night. The watch can also measure blood oxygen saturation levels during sleep, which is an important metric for gauging your body's efficiency and overall health. In addition to sleep tracking, the Galaxy Watch Active2 offers features such as auto workout tracking, pace coaching, and daily goals to help improve your overall health and wellness.
| Characteristics | Values |
|---|---|
| Sleep tracking accuracy | Accurately measures sleep for healthy individuals, but loses accuracy for individuals with sleeping problems or when it cannot detect a heart rate |
| Sleep tracking stages | 4 stages: awake, REM, light, and deep sleep |
| Sleep tracking methods | Uses the onboard accelerometer to detect movement and combines this with user data acquired from its sensor array |
| Additional sleep tracking methods | Devices with built-in thermometers sample body temperature throughout the night |
| Additional sleep tracking methods | Blood oxygen saturation tracking |
| Additional sleep tracking methods | Snoring detection |
| Additional sleep tracking methods | Location tracking to determine when the user is no longer asleep |
| Additional features | Sleep coaching |
| Additional features | Bedtime mode |
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What You'll Learn
Accuracy of sleep tracking
The accuracy of sleep tracking on the Samsung Galaxy Active 2 is a mixed bag. While some users have reported a high level of accuracy, others have complained about its poor performance.
The watch uses a combination of sensors to detect when the wearer falls asleep. It uses an accelerometer to detect movement and matches this data with user information from its sensor array. It also uses heart rate to determine whether the wearer is awake or in light, deep, or REM sleep. This data is then collated and displayed in the Samsung Health app, which can be viewed on the watch or a smartphone.
However, some users have pointed out that the watch's sleep tracking is not always accurate, especially when differentiating between deep and light sleep. This is because the watch infers the sleep stage based on movement and heart rate, whereas brainwave patterns are truly indicative of the sleep phase. For instance, a user reported that their Active 2 watch showed they got none of the deep sleep, whereas their Fitbit Ionic watch showed they got about an hour of deep sleep nightly.
Additionally, the watch's sleep tracking accuracy is affected by external factors such as temperature and the fit of the watch on the wrist. It is also important to note that no fitness tracker is entirely accurate, and sleep data should not be used for self-diagnosis. Instead, it can help identify trends and highlight potential issues.
To improve the accuracy of sleep tracking, users can ensure they are wearing the watch correctly and take into account other factors that may impact their sleep, such as their environment and daily activities.
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Understanding sleep stages
Sleep is divided into two main phases: REM (rapid eye movement) and non-REM sleep. The non-REM phase is further broken down into three stages.
During the night, people usually progress through the three stages of non-REM sleep before entering REM sleep. The cycle then repeats at stage one, where you become very easy to wake up again. The cycle is repeated three to four times any given night.
The first stage of non-REM sleep occurs when you first fall asleep. You will feel relaxed and your brain waves will begin to slow down with occasional bursts of activity. Your heartbeat, eye movements, and muscle activity will slow down.
The second stage of non-REM sleep is when you are in light sleep. Your body temperature drops and your eye movements stop. Your heart rate and breathing will also slow down and your body will become ready for deep sleep.
The third stage of non-REM sleep is deep sleep. This is the stage with the lowest brain, heart, and breathing activity. It is essential for the body's physical recovery. Sleepers usually spend 10%-12% in this stage.
The final stage of sleep is REM sleep. This is the deepest sleep stage, although your body becomes more active. Your eyes move rapidly, your heart rate picks up, and your brain paralyses your muscles, making you very still.
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Snoring detection
The snoring detection feature on the Samsung Galaxy Active 2 is a useful tool to help you understand your sleep patterns better. To enable snoring detection, first, make sure your Wear OS Galaxy Watch is connected to your phone via the Galaxy Wearable app. Then, follow these steps:
- Open the Samsung Health app on your watch and tap Settings.
- Tap the switch next to Blood Oxygen during sleep to turn it on.
- Next, tap Snore detection. This will open the Samsung Health app on your connected phone.
- Tap the switch at the top to turn on Snore detection.
Now, when you sleep, the watch will determine when you have fallen asleep and trigger the microphone on your smartphone to listen for snoring. The next morning, you can check your Snore detection data by opening the Samsung Health app on your phone and tapping the Sleep tracker. You can then swipe to view the data under Snoring.
Please note that you will need to keep your phone nearby while sleeping for the snoring detection feature to work. Additionally, you will need to wear your watch for at least 7 days and nights before you can use the Sleep coaching feature.
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Blood oxygen tracking
The Galaxy Watch Active 2 from Samsung has a lot of health-tracking features, including blood oxygen tracking. Blood oxygen tracking can provide an indication of how effectively your blood is carrying oxygen throughout your body, which can in turn tell you whether you're breathing effectively.
To track your blood oxygen level, you can use the SpO2 sensor on your Galaxy Watch Active 2. However, some users have reported that they are unable to access the data. It is recommended to place your hand on a table, near your heart, and sit still while your watch measures your blood oxygen level. Make sure your watch is on the top of your wrist, not the underside, and not pressing against the bone. If you are unable to successfully measure your blood oxygen levels, try the following: go one hole tighter with the strap or move your watch higher on your wrist for a tighter fit.
Samsung has enabled blood pressure monitoring on the Galaxy Watch Active 2 via a firmware update. This functionality requires initial calibration via a blood pressure cuff. The method of measuring blood pressure is obtained by combining the measurement of heart rate and blood oxygen with special formulas.
Please note that the Galaxy Watch is not a medical/therapeutic device and is not intended for medical use. It is solely intended for fitness and wellness purposes only and is not intended for use in the diagnosis, cure, mitigation, treatment, or prevention of diseases or other conditions.
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Sleep coaching
The Samsung Health app offers a sleep coaching program to help you develop better sleep habits. To access this feature, you must first wear your watch for at least 7 days and nights to collect data on your sleep patterns. You can then access the sleep coaching feature by opening the Samsung Health app on your phone, tapping the Sleep tile, and selecting "Get started with sleep coaching". You will be prompted to answer some questions about your sleep habits, which will help determine how best to coach you.
After completing the initial setup, the app will analyze your sleep data and assign you a "sleep animal" based on your sleep style. These animals include the Unconcerned Lion, Sensitive Hedgehog, Nervous Penguin, Sun Averse Mole, Cautious Deer, Easygoing Walrus, Alligator on the Hunt, and Exhausted Shark. Once you have been assigned your sleeping style, the app will create a personalized 4-5 week coaching program for you. This program includes missions, checklists, sleep-related articles, meditation guidance, and sleep reports.
The sleep coaching program aims to guide you through healthier sleeping patterns and provide you with tools to improve your sleep quality. It is important to note that the sleep coaching settings can only be adjusted from the phone and not the watch itself. Additionally, make sure that your watch software is up to date and that you have enabled the necessary features in the Samsung Health app before beginning.
The Galaxy Watch Active2 offers enhanced sleep tracking analysis and valuable insights on how to improve your sleep. It monitors your sleep patterns, tracks your sleep movements, and provides a sleep score that can be compared to other users in the same age and gender groups. The watch can also detect and record snoring, as well as measure blood oxygen levels during sleep. These features work in conjunction with the sleep coaching program to provide a comprehensive understanding of your sleep habits and help you make positive changes.
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Frequently asked questions
You can track your sleep on the Galaxy Active 2 by using the Samsung Health app on your phone, along with the Sleep tile on your Galaxy Watch.
The watch tracks your sleep patterns, including the number of days you've slept within your set goals, the duration of each sleep phase, and your movements while asleep. It also provides a sleep score, which is calculated based on several factors, including total sleep time and sleep cycles.
The watch uses a combination of sensors to detect when you're asleep, including an accelerometer to detect movement and a sensor array to gather user data. It may also use your location via GPS to determine when you are asleep.
Yes, the Galaxy Active 2 can track your blood oxygen levels during sleep. This feature can be enabled by navigating to the Settings in the Samsung Health app, and then turning on "Blood oxygen during sleep".
Yes, the Galaxy Active 2 offers sleep coaching options, which provide daily goals and coaching programs based on your sleep data to help you form better sleep habits. It also has a Bedtime mode that cancels all audio and vibration alerts except for your alarm.
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