Colin Snow
Sleep is essential for our health and well-being, but unfortunately, many people don't get enough of it. Garmin's sleep tracking feature is a useful tool to help you understand and improve your sleep patterns. By utilizing advanced sleep monitoring technology, Garmin devices can now more accurately track your sleep stages, heart rate variability, body movement, and even respiration rate. This data is then used to generate a personalized sleep score, offering insights and recommendations to enhance your sleep quality. While there may be limitations to the accuracy of wrist-worn sleep trackers, Garmin's advancements have shown promising results, providing a convenient way to better understand your sleep and make informed decisions for a good night's rest.
| Characteristics | Values |
|---|---|
| Heart rate | Used to determine when you fell asleep, when you woke up, and the times you were awake during the night |
| Heart rate variability | Used to determine the time between each heartbeat to more accurately measure your time awake and the duration of each sleep stage |
| Photoplethysmography (PPG) analysis | Used in combination with actigraphy (ACT) data to determine whether you're awake, asleep, or taking a break, and to identify your sleep stage |
| Movement | Tracked by motion-sensing accelerometers to analyze sleep |
| Sleep stages | Light, deep, and rapid eye movement (REM) sleep stages are tracked |
| Age and baseline readings | Add context and improve the reliability of the data |
| Blood oxygen saturation | Monitored continuously throughout the night using a SpO2 sensor to detect potential sleep issues |
| Respiratory rate | Tracked to analyze sleep stages more accurately and detect potential disturbances like sleep apnea |
| Sleep score | Powered by Firstbeat Analytics™, it is based on how long and how well you slept |
| Sleep insights | Offers personalized recommendations to help you better understand and improve your sleep |
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What You'll Learn
How to set up your Garmin sleep tracker
Setting up your Garmin sleep tracker is a straightforward process. Firstly, ensure you have downloaded the Garmin Connect app on your smartphone, as this is where you will receive the most detailed sleep tracking information. When setting up your Garmin watch, you will be prompted to enter your usual sleeping hours. The watch will use this information, along with its onboard sensors, to begin tracking your sleep. You can edit your bedtime or wake-up time in the app by navigating to Settings > User Settings. This will prevent the watch from disturbing you during your designated sleeping hours.
Some Garmin devices also track your heart rate, respiration rate, and blood oxygen saturation levels during sleep, providing a comprehensive overview of your sleep quality and duration. The data is presented in a timeline that shows when you fall asleep and wake up, rather than simply when you get into and out of bed. This allows Garmin to offer in-depth insights and recommendations to improve your sleep.
It is important to ensure that your Garmin device fits snugly on your wrist to avoid any issues with data tracking. If the watch's heart rate monitor cannot read your heart rate because it is too loose or too tight, the data may be inaccurate.
To get the most out of your Garmin sleep tracker, it is recommended to review and edit your sleep data as needed. This can be done by syncing your device with the Garmin Connect app and making any necessary adjustments. For example, if you got up during the night for an extended period, you can edit this information to ensure a more accurate picture of your sleep patterns.
Overall, by following these simple steps, you can easily set up and utilise your Garmin sleep tracker to gain valuable insights into your sleep habits and work towards improving your sleep quality.
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How Garmin's sleep tracking has improved
While Garmin's sleep tracking technology has been criticised for its inaccuracy, there are indications that it has improved over time.
Historically, Garmin devices relied solely on movement, tracked by motion-sensing accelerometers, and heart rate to analyse sleep. This has improved with the introduction of ''Advanced Sleep Monitoring,', which uses heart rate variability to more accurately measure the time awake and the duration of each sleep stage. This includes REM sleep, which is characterised by more erratic heart rates, and non-REM sleep, where heart rates are lower.
Garmin's sleep tracking accuracy has been compared to that of competitors like Fitbit, Oura Ring, and Apple Watch. While some users claim that Garmin's sleep tracking is subpar compared to these competitors, others assert that it has improved and is now on par with or even better than these alternatives. For example, a May 2025 test of Garmin's Advanced Sleep Tracking showed that the data was consistently in line with that of the Oura Ring 4 and Whoop 5.0, indicating a marked improvement in consistency.
Additionally, some Garmin devices now measure blood oxygen saturation and respiratory rate during sleep, although these metrics are presented separately from sleep data.
Despite these improvements, there is still room for enhancement, especially in the Fenix 7 series, which has not received a sleep accuracy update since its release. Users have also noted that Garmin sleep tracking can be inaccurate when a person spends too much time in bed before sleeping or after waking up, and when they wake up during the night without getting out of bed.
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How to interpret your sleep data
Your Garmin sleep data is presented as a sleep score, a number between 0 and 100 that summarises the underlying data to reveal how well you slept. A high sleep score means you are well-rested and prepared for the day's challenges. The score is calculated based on a combination of factors, including sleep quantity, sleep quality, and evidence of recovery activity in your autonomic nervous system. Sleep quantity and quality are assessed by comparing your recorded sleep duration to age-based standards agreed upon by sleep experts. For example, adults are generally recommended to get between seven and nine hours of sleep each night.
Your heart rate and heart rate variability are key inputs in determining your sleep score. Garmin devices use photoplethysmography (PPG) analysis to track changes in your heart rate throughout the night. During REM sleep, your heart rate is more erratic, while it is lower during non-REM sleep. Heart rate variability can also indicate your body's response to stress, with a rise in variability suggesting elevated stress levels. Additionally, your 'sleep clock' is activated when your heart rate decreases to levels that the watch interprets as sleep.
Some Garmin devices also track your respiration rate and blood oxygen saturation (Pulse Ox) during sleep. Tracking respiration rate provides a more comprehensive view of your sleep, while monitoring blood oxygen saturation can indicate the efficiency of oxygen delivery from your lungs to your body's tissues. This metric can help detect potential sleep issues. However, not all Garmin devices have the necessary sensors, and monitoring may be limited to specific time frames.
Body movement data is another critical component of your sleep analysis. Garmin devices use actigraphy (ACT) data to identify sleep stages and periods of wakefulness. The accelerometer detects any movement during sleep, which helps determine whether you are awake, asleep, or just taking a break from sleep.
Your sleep score also takes into account personal recovery metrics, which are derived from the same technology that powers all-day stress tracking and Body Battery™ features. This analysis interprets the activity within your autonomic nervous system, specifically the balance between the parasympathetic ("rest-and-digest") and sympathetic ("fight-or-flight") branches. This interpretation provides insight into the restorative power of your sleep. Factors such as strenuous evening activity, alcohol consumption, and immune system activity can influence your recovery levels.
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How to improve your sleep score
To improve your sleep score, you must first understand what it is based on. Garmin's sleep score is a number between 0 and 100 that summarises your sleep quality based on factors like sleep duration, sleep stages and awake time. The amount of sleep you need depends on your age but is generally between 7 and 9 hours.
- Reduce interruptions to your sleep: As mentioned earlier, the sleep score considers the number of times you wake up during the night and the time spent awake after initially going to bed. Reducing interruptions to your sleep will help improve your sleep score.
- Optimise your sleep stages: Garmin breaks down sleep into four stages: awake spells, REM, light sleep, and deep sleep. Each stage serves a specific purpose, with REM supporting cognitive functions and memory, and deep sleep aiding muscle recovery, restoring body tissue, and improving immune health. Aim for a deeper sleep stage by following Garmin's tips on lengthening sleep stage spells.
- Manage your time: Getting more sleep is often a matter of time management and prioritisation. Try adjusting your schedule to prioritise a healthy sleep duration, which will positively impact your sleep score.
- Improve your lifestyle choices: Your daily decisions and lifestyle choices can significantly impact your sleep quality. Garmin's sleep insights provide personalised recommendations to help you understand and improve your sleep. For example, you might receive tips on improving your sleep timing and maintaining consistency.
- Monitor your stress levels: Your sleep score considers your average stress level during sleep. Higher stress levels can lead to lower sleep scores. Try incorporating stress-reducing activities into your routine, such as meditation or light exercise, to help improve your sleep score.
- Use advanced sleep monitoring: If your Garmin device supports it, utilise the Advanced Sleep Monitoring feature to gain more detailed insights into your sleep. This feature requires a heart rate monitor and uses metrics such as heart rate and heart rate variability to understand your sleep patterns better.
Remember, improving your sleep score is not just about getting a higher number. It's about understanding your sleep patterns and making informed decisions to enhance your overall sleep quality and, consequently, your daily life.
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How Garmin sleep tracking compares to other devices
Sleep tracking is one of the easiest ways to maximize the benefits of your Garmin watch. In recent years, Garmin has improved its sleep tracking capabilities by adding more helpful insights into your slumber. Now, instead of just receiving a Sleep Score or Sleep Stages graph, Garmin uses this sleep data to inform Training Readiness, Training Status, and Body Battery.
Garmin's sleep tracking has traditionally been a weak area for the brand. In the past, Garmin devices relied solely on movement—tracked by motion-sensing accelerometers—and heart rate to analyze your sleep. Since the debut of 'Advanced Sleep Monitoring', Garmin has improved the accuracy of its sleep tracking by utilizing heart rate variability to more precisely measure your time awake and the duration of each sleep stage.
Garmin's sleep tracking compares well to other devices on the market. In a May 2025 test, the data logged on a Garmin Forerunner 970 was consistently in line with that tracked by the Oura Ring 4 (considered the best wearable sleep tracker overall) and Whoop 5.0. While Garmin sleep tracking has improved, it still lags in areas such as wake periods and occasionally produces erroneous sleep scores.
It's important to note that the accuracy of wrist-worn wearables, including Garmin devices, has consistently been shown to fall short compared to professional sleep laboratory equipment. However, the accuracy of Garmin's sleep tracking appears to be improving, and it now offers valuable insights into your sleep patterns and overall health.
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Frequently asked questions
When you first get your watch, you’ll choose a daily sleep schedule. You can edit this later. This sets up a period to help the watch detect your sleep and automatically puts the watch on 'do not disturb' mode.
The Garmin watch uses advanced sleep tracking, which uses your heart rate, heart rate variability, and body movement data to determine when you fell asleep, when you woke up, and the times you were awake during the night. It also looks at when you were in the light, deep, and rapid eye movement (REM) sleep stages and for how long. Certain Garmin devices also track your respiration rate and blood oxygen saturation.
The accuracy of the Garmin sleep tracker has improved over the years. In a May 2025 test, the data logged on a Garmin Forerunner 970 was consistently in line with that tracked by the Oura Ring 4 and Whoop 5.0. However, it still lags in areas such as wake periods. It's important to note that some factors, such as stress, sleepwalking, or alcohol consumption, may influence accuracy.
The Garmin sleep tracker offers personalized recommendations and insights to help you understand and improve your sleep. For example, it might encourage you to maintain sleep timing and consistency for better sleep quality.
