Colin Snow
The Polar M400 is a GPS-enabled running and cycling watch that can also be used as a daily activity tracker. It is a comfortable, mid-range device that can track your sleep time and quality (restful or restless) if you wear it at night. The watch automatically detects when you are sleeping through your wrist movements and can guide you towards better sleeping habits.
| Characteristics | Values |
|---|---|
| Sleep tracking | Tracks sleep time and quality (restful or restless) |
| Sleep tracking activation | No sleep mode activation is needed. The device automatically detects that you're sleeping from your wrist movements |
| Sleep tracking data | Sleep time and quality are shown at the Flow web service and Flow app after the device is synced |
| Sleep tracking period | Sleep time is the longest continuous rest time that takes place within 24 hours starting from 6 pm to the next day's 6 pm |
| Sleep tracking breaks | Breaks shorter than one hour in your sleep don't stop sleep tracking, but they are not taken into account in the sleep time. Breaks longer than one hour stop sleep time tracking |
| Sleep tracking calculation | The periods when you sleep peacefully and don't move a lot are calculated as restful sleep. Periods when you move and change your position are calculated as restless sleep |
| Sleep tracking insights | Polar Sleep Plus™ provides feedback and detailed sleep insights to guide you towards better sleeping habits |
| Sleep tracking recommendations | The recommended sleep range for most adults is 7 to 9 hours |
| Sleep tracking personalisation | The optimal amount of sleep for you is the one that leaves you feeling alert and full of energy to perform at your best |
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What You'll Learn
The Polar M400 has an automatic sleep tracking feature
The Polar M400 is a GPS watch that acts as an all-day activity tracker, making it useful even when you're not running or cycling. It is a very capable crossover device that can be used as an everyday activity monitor, recording your steps and distance even with GPS turned off. It is a good midrange device for those who are looking to step up their fitness tracking.
The Polar M400 has an automatic sleep-tracking feature. It will track your sleep time and quality (restful or restless) if you wear it at night. You don't need to turn on a sleep mode; the device automatically detects from your wrist movements that you're sleeping. Sleep time and quality are shown on the Flow web service and Flow app after the M400 is synced. Your sleep time is the longest continuous rest time that takes place within 24 hours, starting from 6 pm to the next day's 6 pm. Breaks shorter than one hour in your sleep don't stop sleep tracking but are not counted in the total sleep time. Breaks longer than one hour stop sleep time tracking. The periods when you sleep peacefully and don't move around a lot are calculated as restful sleep, while periods when you move and change your position are calculated as restless sleep.
The Polar Flow app and web service will show you how many inactivity stamps you have received. This way, you can check back on your daily routine and make changes towards a more active life. The app and website do a good job of feeding your information about your activities and workouts. You can also use the app to follow and analyse your activity data on the go and have your data synced wirelessly from your M400 to the Polar Flow service.
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It detects sleep by recording wrist movements
The Polar M400 is a GPS watch that acts as an all-day activity tracker, making it useful even when you're not running or cycling. It has an internal 3D accelerometer that records your wrist movements. It detects sleep by recording wrist movements—it has automatic sleep tracking that will kick in once you go to bed at night. You don't have to turn the sleep mode on, the device automatically detects from your wrist movements that you're sleeping. Sleep time, and its quality (restful or restless) is shown at the Flow web service and Flow app after M400 is synced. The Polar Flow app will also show you how many inactivity stamps you have received, so you can check back on your daily routine and make changes towards a more active life.
The M400 tracks your activity with an internal 3D accelerometer that records your wrist movements. It analyzes the frequency, intensity, and regularity of your movements together with your physical information, allowing you to see how active you are in your everyday life. The time you need to be active during the day to reach your activity goal depends on the level you have chosen and the intensity of your activities. Meet your goal faster with more intense activities or stay active at a slightly more moderate pace throughout the day. Age and gender also affect the intensity you need to reach your goal. The younger you are, the more intense your activity needs to be.
The M400 gradually fills up an activity bar to indicate your progress towards your daily goal. When the bar is full, you've reached your goal. You can view the activity bar in Today's activity and in time view (change the watch face by pressing and holding UP). In Today's activity, you can see how active your day has been so far and get guidance on how to reach your goal. Active time tells you the cumulative time of body movements that benefit your health.
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It distinguishes between restful and restless sleep
The Polar M400 is a GPS-enabled running and cycling watch that can also be used as an everyday activity monitor, recording your steps and distance even with GPS turned off. It is also capable of sleep tracking.
The M400 tracks your sleep time and quality (restful or restless) if you wear it at night. The device automatically detects from your wrist movements that you're sleeping and you don't have to turn the sleep mode on. Sleep time is the longest continuous rest time that takes place within 24 hours starting from 6 pm to the next day's 6 pm. Breaks shorter than one hour in your sleep don't stop sleep tracking but are not taken into account in the sleep time. Breaks longer than one hour stop sleep time tracking. The periods when you sleep peacefully and don't move a lot are calculated as restful sleep. Periods when you move and change your position are calculated as restless sleep.
The M400 uses an internal 3D accelerometer to record your wrist movements. It analyses the frequency, intensity and regularity of your movements together with your physical information, allowing you to see how active you are in your everyday life. The M400 gives you an activity goal each day and guides you in reaching it. The activity goal is based on your personal data and activity level setting, which you can find in the Daily Activity Goal settings in the Flow web service.
The Polar Flow mobile app allows you to follow and analyse your activity data on the go and have your data synced wirelessly from your M400 to the Polar Flow service. The app and website will also show how many inactivity alerts you received throughout the day and tell you what kind of activities you could do to reach your daily goals.
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It can be synced with the Polar Flow app and web service
The Polar M400 is a GPS watch that can be synced with the Polar Flow app and web service. It is a 24/7 activity tracker, monitoring your steps, distance, and sleep. The watch can be synced with a smartphone via Bluetooth or a USB-charging chord.
The Polar Flow app and web service allow you to view your sleep data, tracking your sleep time and quality (restful or restless). The device automatically detects when you are sleeping through your wrist movements, with no need to turn on a sleep mode. The sleep tracking feature is highly accurate, differentiating between sleep and lazy days on the couch.
The app and web service also provide feedback on your sleep, allowing you to see where to make improvements or changes. This includes suggestions for activities to reach your daily goals, such as skateboarding or gardening. The app will also notify you when you have been idle for too long.
The Polar Flow app and web service provide an easy-to-understand display of your data. The app is simple to navigate, and the web service is accessible through a standard web browser. The Polar M400 is a great option for those seeking a device to track their sleep and activity, with the added functionality of syncing to a smartphone or web service.
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It provides feedback and insights to improve sleep quality
The Polar M400 is a GPS-enabled running and cycling watch that can also track your sleep. It has an internal 3D accelerometer that records your wrist movements and analyses the frequency, intensity and regularity of your movements. This allows the device to automatically detect when you fall asleep, wake up and how long you spent sleeping. It also measures the quality of your sleep, tracking when you sleep peacefully and don't move a lot (restful sleep) and when you move and change your position (restless sleep). This data is then used to provide feedback and insights to improve sleep quality.
The Polar M400 provides feedback on your daily activities and sleep. The Polar Flow app congratulates you if you reach your active goals for the day, but also reminds you that sitting for extended periods of time isn't good for your health. The app and website also show how many inactivity alerts you received throughout the day and tell you what kind of activities you could do to reach your daily goals. For example, you might be advised to go skateboarding for an hour or to garden for an hour and a half. The app syncs with Apple's Health app on iOS 8, giving you a second option to view your data.
The Polar M400 also provides detailed sleep insights to guide you towards better sleeping habits. It tells you how much time you actually slept during the night, and whether your sleep was continuous or fragmented. It also gives you feedback on the quality and duration of your sleep. You can rate how you slept on a five-step scale to get more detailed feedback. This allows you to discover the optimal amount of sleep you need and make adjustments to your routine if necessary.
The Polar M400 helps you to understand your sleeping habits and patterns by tracking your sleep over time. You can compare your night-to-night averages and assess your patterns to identify what you're doing during the day that might be affecting your sleep. For example, a heavy meal before sleep, a busy and stressful day, or the temperature and darkness of your sleeping environment may all impact the quality of your sleep. The Polar M400 provides weekly summaries in your Polar Flow account to help you evaluate how regular your sleep-wake pattern is. This information can help you make informed decisions about your sleep habits and make adjustments to improve your sleep quality.
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Frequently asked questions
The Polar M400 has automatic sleep tracking, so you don't need to turn on a sleep mode. Simply wear the device to bed, and it will automatically detect that you're sleeping through your wrist movements.
You can see your sleep tracking data on the Polar Flow mobile app or the Polar Flow website. The app is available on iOS 8 and syncs with Apple's Health app.
The Polar M400's sleep tracking feature provides information on the quality of your sleep (restful or restless) and the quantity of your sleep (how many hours).
