Active 2'S Sleep Tracking: Understanding Your Rest

The Samsung Galaxy Watch Active 2 is a sleek smartwatch with built-in sleep-tracking, automatic workout tracking, and above-average battery life. It uses movement and heart rate to determine if the wearer is 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 is recommended to be viewed on a smartphone. The watch offers valuable insights on how to get a better night's sleep and also monitors stress levels.

The Samsung Galaxy Active 2 uses movement and heart rate to determine sleep phases

The Samsung Galaxy Active 2 is a sleek smartwatch that can track sleep in addition to providing other health and fitness features. It is a great option for Android users who are looking for a good smartwatch with advanced sleep-tracking features.

Heart rate data is also crucial in differentiating between the various sleep phases. When a person is awake, their heart rate is typically higher compared to when they are asleep, except during the REM sleep phase, where the heart rate is more variable and may reach the same levels as when the person is awake. During the light sleep phases (stages 1 and 2), the heart rate begins to slow down but doesn't reach the lowest level as the body is still active and needs oxygen from the blood. In the deep sleep phase (stage 3), the heart rate reaches its lowest level.

The sleep data is tracked in the Samsung Health app, which can be viewed on the watch but is recommended to be viewed on a smartphone. The app provides valuable insights on how to get a better night's sleep and also monitors the user's stress levels. The watch also has features such as automatic workout tracking, advanced workout tracking, and above-average battery life.

Heart rate variability is used to help define REM sleep

The Samsung Galaxy Active 2 uses movement and heart rate to determine the different phases of sleep. It can differentiate between being awake, and being in light, deep, or REM sleep. Heart rate variability (HRV) is a useful tool to explore the sleeping brain and is widely used to explore autonomic modulation. HRV analysis can reveal higher parasympathetic tone during normal non-REMS and a shift towards sympathetic predominance during normal REM sleep. This indicates that the heart rate is controlled by the sympathetic and parasympathetic systems, which induce heart rate oscillations at different rhythms.

During the wakefulness-sleep transition, there is a decrease in blood pressure, heart rate, and cardiac output. When entering stable non-REMS without arousal, there is a marked decrease in heart rate. These cardiovascular changes are accompanied by increased HF power and decreased LF power and LF/HF ratio, indicating lower cardiac sympathetic modulation with predominant parasympathetic heart modulation.

During REM sleep, the brain turns off the nerves that control our large muscle groups, resulting in paralysis even as brain activity increases. This is similar to the wakefulness-sleep transition, where there is a decrease in blood pressure, heart rate, and cardiac output. However, during REM sleep, the heart rate is more variable and may reach similar levels as when awake. This variability in heart rate during REM sleep is also associated with dream intensity and emotionality.

The Samsung Galaxy Active 2 utilises heart rate variability to help define REM sleep by tracking the user's heart rate and movement to determine the different phases of sleep. This data is then recorded in the Samsung Health app, providing valuable insights into the user's sleep patterns.

Sleep tracking can be viewed on the Samsung Health app

The Samsung Galaxy Watch Active 2 is a sleek smartwatch that offers built-in sleep-tracking capabilities. It provides valuable insights to help you get a better night's sleep. The watch uses advanced sleep tracking technology to monitor your sleep patterns and provide a detailed breakdown of your sleep stages, including light sleep, REM sleep, and deep sleep. This data is then synced to the Samsung Health app, which presents the information in an easy-to-understand manner.

The Samsung Health app offers a comprehensive overview of your sleep metrics. It displays your total time asleep, sleep stages, efficiency percentage, calories burned, consistency targets, and trends over time. This information can help you understand your sleep patterns and make informed decisions to improve your sleep quality. The app also allows you to view charts and analyse your heart rate changes throughout the day.

The Galaxy Watch Active 2's sleep tracking feature uses a combination of heart rate monitoring and motion detection to determine your sleep phases accurately. It differentiates between the different stages of sleep, such as REM, light sleep, and deep sleep, by analysing your heart rate patterns and movement during sleep. The watch can identify when you are awake, in light sleep, or in a deeper sleep stage, and this data is then presented in the Samsung Health app.

While the sleep tracking feature of the Galaxy Watch Active 2 provides valuable insights, it is important to note that it may not always be entirely accurate. There have been instances where the watch has incorrectly identified sleep timings. However, with some fine-tuning and improvements, the sleep-tracking capability can be enhanced to provide more precise results. It is recommended to view the sleep data on a smartphone for a more comprehensive analysis.

The Active 2 has a long-lasting battery life

The Active 2 can last about two and a half days on a single charge, which is a significant improvement on some of its competitors. For example, the Apple Watch Series 5 only lasts about 18 hours with its always-on display. The Active 2's battery life does depend on usage and settings, however. If you keep the always-on display turned on, the battery life drops to about 48 hours, and if you're using it for workouts, you can expect it to last about 2 days.

The Active 2's long-lasting battery means you can track your sleep without worrying about your device dying in the middle of the night. You can also get a quick boost from your compatible Galaxy phone with wireless power-sharing.

The Active 2 also monitors stress levels and provides breathing exercises

The Samsung Galaxy Watch Active 2 is a sleek smartwatch with built-in sleep-tracking, advanced workout-tracking, and an above-average battery life of about two and a half days on a single charge. It is one of the best fitness trackers you can buy. The Active 2 also monitors stress levels and provides breathing exercises.

The Active 2's built-in sleep tracker offers valuable insights on how to get a better night's sleep. It 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 or a smartphone. The app lays out all of your sleep metrics in an easy-to-understand way, showing your total time asleep, sleep stages (awake, REM, light, and deep), efficiency percentage, calories burned, consistency targets, averages, trends over time, and more.

The Active 2 also has a stress-tracking feature, which monitors your stress levels throughout the day. If your stress levels get high, you can receive prompts to follow guided breathing exercises to help you relax. This can be enabled by tapping on the Stress app/widget, selecting the gear icon, and then sliding the toggle to have it 'Always enabled'.

In addition to tracking your sleep and stress levels, the Active 2 also provides other health features such as an FDA-cleared ECG sensor for diagnosing atrial fibrillation, automatic workout tracking, and pace coaching. The watch can track seven activities automatically, including running, walking, swimming, cycling, rowing, elliptical workouts, and a dynamic workout option. It can also track over 39 other workouts if you manually start the activity.

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