Gina Johnson
Sleep tracking devices are a great way to monitor your sleep patterns and quality. The Samsung Galaxy Active 2 is one such device that can help you understand your sleep better. By using a combination of movement detection and heart rate tracking, the watch can differentiate between the various stages of sleep and provide insights into the quality and length of your sleep. In this article, we will explore how the Samsung Galaxy Active 2 works, the different metrics it tracks, and how it can help you improve your sleep habits.
| Characteristics | Values |
|---|---|
| Sleep tracking | Automatic sleep tracking based on movement and heart rate |
| Sleep stages | 4 stages: awake, REM, light, and deep |
| Sleep data | Sleep duration, sleep quality, sleep score, sleep stages, blood oxygen, snoring data |
| Sleep coaching | Personalized sleep coaching based on sleep data |
| Sleep goals | Set sleep goals and create a customized sleep schedule |
| Sleep consistency | Shows the number of days in the current week within set sleep goals |
| Snore detection | Records and alerts user to snoring during sleep |
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What You'll Learn
Heart rate and movement tracking
During the REM (Rapid Eye Movement) stage, your heart rate becomes more variable and may even reach levels similar to when you are awake. Your muscles remain motionless, but your brain is highly active. This stage is characterized by the movement of your eyes, and your heart rate picks up and varies. Interestingly, your brain paralyzes your muscles, resulting in very still body movement.
Before the REM stage, your heart rate begins to slow down during the initial sleep stages (Stage 1 and Stage 2), as your body transitions from being awake to a state of light sleep. Your heart rate doesn't reach its lowest level during these stages because your body is still active and requires oxygenated blood.
In the deep sleep stage (Stage 3), your heart rate reaches its lowest level. You barely move, if at all, during this phase. This stage is marked by minimal movement and a significantly reduced heart rate compared to the REM stage.
By tracking your heart rate and movement, devices like the Samsung Galaxy Active 2 can accurately determine which sleep stage you are in. This information is then used to provide insights into your sleep quality and duration, helping you understand your sleep patterns and make informed decisions to improve your sleep habits.
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Sleep stages and sleep scores
Sleep tracking devices can be useful in helping you recognize patterns in your sleep habits. They can provide data on your sleep duration, quality, and phases. However, it's important to note that sleep trackers have a history of being inaccurate, especially for individuals with sleeping problems or irregular heart rates.
The Samsung Galaxy Active 2 watch is one such device that can track your sleep. It does this by recording your movement and heart rate. By analyzing your movement and heart rate patterns, the device can determine when you are awake, in light sleep (stages 1 and 2), deep sleep (stage 3), or REM sleep.
- Stage 1: This is the lightest stage of sleep, lasting only a few minutes. It is easy to wake someone up during this stage. Your heart rate begins to slow down, and your body and brain activities start to slow with periods of brief movements.
- Stage 2: This is still light sleep, but deeper than stage 1. Your heart rate and breathing slow down further, and your body temperature drops. Brain waves show a new pattern, and eye movement stops. You may experience short bursts of brain activity, which experts believe are your brain organizing memories and information.
- Stage 3 (Deep Sleep): This is a deep sleep stage where it becomes harder to wake someone up. Your heart rate reaches its lowest level, and your muscle tone, pulse, and breathing rate decrease as your body relaxes even further. Brain waves during this stage are slow but strong, and it is critical for restorative sleep, allowing for bodily recovery, growth, and immune system enhancement.
- REM (Rapid Eye Movement) Sleep: This stage is characterized by rapid eye movements, increased brain activity, and temporary paralysis of the muscles (except for the eyes and breathing muscles). Your heart rate may reach similar levels as when you are awake, and your breathing quickens. Dreams occur during this stage, and it is important for learning, memory, and cognitive functions.
The duration and quality of sleep in each stage can vary across different age groups. For example, newborns have different sleep stages, including quiet sleep (similar to NREM), active sleep (similar to REM), and indeterminate sleep. As they grow older, their sleep patterns change, and by 2-5 years of age, they require about 11-13 hours of sleep per day. Adolescents need about 9-10 hours of sleep, and adults aged 65 and older tend to sleep and wake up earlier compared to younger adults.
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Sleep coaching
Sleep coaches can help with a variety of issues, such as:
- Waking up too early
- Sleepwalking
- Snoring
- Insomnia
- Oversleeping
- Lack of sleep
- Difficulty falling asleep or staying asleep
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Blood oxygen levels
Samsung Health on the Galaxy Watch4 series can continuously measure blood oxygenation levels, even during sleep, to check your health.
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Snoring detection
The Samsung Galaxy Active 2 can help you monitor your sleep patterns, track your sleep movements, and see how they line up with your sleep score. The watch can also track your blood oxygenation levels during sleep.
The watch also has a snoring detection feature. To enable this feature, open the Samsung Health app, scroll down and choose “Sleep”. Select “Sleep detection” and make sure it is toggled on. After agreeing to the pop-up permissions, you should see a category that says “Detect snoring”. You can then decide between “Always” or “Once” and toggle on/off Record audio. Once this is set up, the device will listen out for snoring. When you snore, it saves that portion of the recording. You can also see if your oxygen saturation changes as a result of snoring by matching up the recordings with the SpO2 graph. However, you will need to do this manually.
It is important to note that the watch does not use a built-in microphone for snoring detection. Instead, when the device on your wrist determines you have fallen asleep, it will trigger the microphone on your smartphone. Therefore, you need to keep your phone next to you while sleeping for snoring detection to work.
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Frequently asked questions
The Active 2 uses a combination of sensors to detect when you fall asleep. It uses an accelerometer to detect movement and matches this with user data from its sensor array. It also uses your heart rate to differentiate between when you are awake, in light sleep, deep sleep, or REM sleep.
To set up sleep tracking, you need to enable it in the Samsung Health app. Then, wear your watch when you go to bed. Make sure it is securely attached to your wrist and that your phone is nearby.
The Active 2's sleep tracking feature includes sleep stage data, sleep duration, and sleep scores. It also includes snoring detection and blood oxygen levels.
