Colin Snow
Sleep tracking is an important feature for many Apple Watch users. While the Apple Watch Series 2 does not have built-in sleep tracking, there are several third-party apps that can be used to track sleep. These include SleepWatch, Pillow, Sleep++, and SleepWatch. Additionally, Apple Watch Series 3 or later with watchOS 8 can measure and track respiratory rate. To use sleep tracking, the Apple Watch must be enabled and worn for at least one hour each night. Users can also set up sleep schedules and goals, as well as enable Sleep Focus to reduce distractions before bedtime. Sleep data can be viewed on the Apple Watch or iPhone through the Health app.
| Characteristics | Values |
|---|---|
| Heart rate monitoring | Continuously monitors heart rate to determine if the user is awake or in light, deep, or REM sleep |
| Sleep tracking | Automatically records sleep based on movement and heart rate |
| Sleep phases | Differentiates between four stages of sleep: awake, REM, light, and deep |
| Sleep data | Sleep data can be viewed on the watch or smartphone through the Samsung Health app |
| Sleep score | Provides a sleep score based on sleep duration and movement, which can be compared to other users in the same age and gender groups |
| Blood oxygenation | Measures blood oxygenation levels during sleep (only available on the Galaxy Watch4 series) |
| Snoring detection | Records and alerts the user to any sounds made while sleeping |
| Design | Available in aluminum or stainless steel with various faces, bands, and finishes |
| Size | Light and comfortable enough to wear anywhere |
| Battery life | Requires charging every two days |
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What You'll Learn
Samsung Health app
The Samsung Health app is a great way to track your sleep patterns and improve your sleep quality. The app can be used in conjunction with a Galaxy Watch or Fit, or with a smartphone.
To get started with sleep tracking, open the Samsung Health app on your device. If you're using a Galaxy Watch or Fit, swipe up and tap "Settings", then "Sleep". Here, you can enable features such as "Snore detection", which records and alerts you to any snoring during the night. If you're using the app on your smartphone, simply tap the "Sleep" card and then the Snoring" card to access the same features.
Once you've enabled sleep tracking, the Samsung Health app will monitor and analyse your sleep patterns. It will track metrics such as sleep time, sleep quality, sleep stages, blood oxygen levels, and snoring data. You can also rate your sleep quality by tapping on the stars within the app, with one star being the lowest rating and five stars being the highest.
After the app has collected enough data, it will provide you with a sleep coaching program. This program will offer personalised advice and missions to help you improve your sleep habits. To access the sleep coaching feature, tap on More options (the three vertical dots) and then select Sleep coaching. The app will generate a four-to-five-week coaching program based on your sleep data.
The Samsung Health app also allows you to set sleep targets. You can input your desired "Bedtime" and "Wake-up" times, and the app will help you work towards achieving a refreshing sleep cycle. It will also display your sleep data in chart and graph form, so you can see your progress over time.
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Heart rate and movement tracking
The Samsung Galaxy Active 2 uses your movement and heart rate to determine whether you are awake or in light, deep, or REM sleep. This data is tracked in the Samsung Health app, which can be viewed on the watch but is recommended to be viewed on a smartphone.
When you are awake, you typically move your arms frequently. When you stop moving your arms as much and have them in a different position, this indicates that you may be asleep. This does occasionally get mistaken, and sleep tracking will start when a person is awake. For example, someone working at a desk may be very still with one arm, and have their arm in a similar position to when they are laying down.
Stage 1 and 2 are very similar. You are in a light sleep and are more likely to move around. However, your motions are not as controlled as when you are awake. Deep sleep and REM sleep are characterized by a lack of motion. Without heart rate information, it is hard for sleep-tracking apps to differentiate between when you are awake and in light sleep, as well as between deep sleep and REM sleep.
REM sleep is the deepest sleep stage, although your body becomes more active. It is characterized by the movement of the eyes, and your heart rate also picks up and varies, but your brain paralyzes your muscles, making you very still. Sleep trackers typically log the time and duration of your sleep, how much time they see you spending in each sleep phase, and how often you wake or move during the night.
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Sleep phases
Sleep is a complex and variable process that is essential for the body and brain to rest and recover. The quality and quantity of sleep needed vary from person to person and can even be influenced by genetics. While the exact mechanisms of sleep are not fully understood, experts have identified distinct sleep phases that play a vital role in ensuring restorative sleep.
The human body typically cycles through two main phases of sleep: rapid-eye movement (REM) sleep and non-rapid eye movement (NREM) sleep. The NREM phase is further divided into three stages, labelled N1 to N3. Each phase and stage is characterised by unique variations in muscle tone, brain wave patterns, and eye movements. On average, the body cycles through all stages approximately 4 to 6 times each night, with each cycle lasting around 90 minutes.
The first stage of NREM sleep, N1, is a transition period between wakefulness and sleep. During this stage, muscle activity slows down, and the eyes move more slowly, with occasional jerky movements. Heart rate, eye movement, and brain wave activity are all indicators that help determine when someone has entered the N1 stage.
The second stage of NREM sleep, N2, is a period of light sleep where body temperature drops and heart rate slows. This stage is characterised by brief bursts of brain wave activity, with some deeper waves indicating a transition to a deeper sleep.
The third and final stage of NREM sleep, N3, is also known as slow-wave sleep (SWS). This is the deepest stage of sleep, marked by very slow brain waves known as delta waves. Arousal from this stage is difficult, and if someone is awakened during N3, they may experience sleep inertia, a transient phase of mental fogginess lasting up to an hour. It is during this critical stage that the body repairs and regenerates tissues, builds bone and muscle, and strengthens the immune system.
Following the NREM stages, the body enters REM sleep, characterised by rapid eye movements, increased heart and respiratory rates, and more erratic brain activity. Dreaming occurs during this stage, and the body becomes temporarily paralysed to prevent us from acting out our dreams.
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Sleep tracking analysis
The Samsung Galaxy Watch Active2 is a sleek and lightweight smart watch that offers enhanced sleep tracking analysis. The watch uses the Samsung Health app to track your sleep patterns, monitor your sleep movements, and provide a sleep score. The sleep score is calculated based on the duration of each sleep phase and your movements during sleep, and it can be compared to the scores of other users in the same age and gender groups.
The Galaxy Watch Active2 uses your movement and heart rate to determine if you are awake or in light, deep, or REM sleep phases. This data is then tracked in the Samsung Health app, which can be viewed on the watch but is recommended to be viewed on a smartphone. The watch automatically records your sleep based on your movement, and you also have the option to turn on Record REM sleep to track the four stages of sleep: awake, REM, light, and deep.
The watch will alert you if it detects a high or low heart rate. Additionally, it monitors your stress levels and integrates with the Calm app to help you relax. The Samsung Health app also includes a snoring detection feature that records and alerts you to any sounds you make while sleeping.
While the Galaxy Watch Active2 offers enhanced sleep tracking analysis, it is important to note that it only has a two-day battery life, which may be inconvenient for continuous sleep tracking.
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Sleep score
The Samsung Galaxy Watch Active2 is a sleek and lightweight smart watch that can be used to track sleep. The watch uses the Samsung Health app to monitor sleep patterns and movements, and to provide a sleep score. This score is calculated based on the duration of each sleep phase and the user's movements while asleep. The sleep score can be compared to the scores of other users in the same age and gender groups.
The watch automatically records sleep based on the user's movements and heart rate. It can track the four stages of sleep: awake, REM, light, and deep. The heart rate and movement data are used to determine which phase of sleep the user is in. For example, during REM sleep, the user's heart rate picks up and varies, but their muscles are paralysed, resulting in very still movement.
The watch also offers pace coaching and stress monitoring, as well as automatic alerts if a high or low heart rate is detected. However, one drawback is that the watch only has two days' worth of battery life, which can be inconvenient for sleep tracking.
Overall, the Samsung Galaxy Watch Active2 provides valuable insights and guidance to help users improve their sleep quality and achieve a healthier lifestyle.
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Frequently asked questions
The Samsung Galaxy Active 2 uses your movement and heart rate to determine if you are awake, or in light, deep, or REM sleep phases. This data is tracked in the Samsung Health app, which can be viewed on the watch, but it is recommended to view it on a smartphone.
To set up sleep tracking on the Samsung Galaxy Active 2, you need to download the Samsung Health app. This app is available for the Galaxy Fit2, Galaxy Watch Active2, Galaxy Watch3, and Galaxy Watch4 series.
You can view your sleep data on the Samsung Health app, which can be accessed on your smartphone.
While the Samsung Galaxy Active 2 provides valuable insights on how to get a better night's sleep, it is not intended to be used for the diagnosis or treatment of any disease or health condition.
