Gina Johnson
Fitbit devices have been around for a while and are still one of the most popular fitness trackers. The Fitbit Flex 2 is an upgrade from the original Fitbit Flex, which was a basic activity and sleep tracker. The new version has added features such as waterproofing and smartphone notifications. The Fitbit Flex 2 can be worn on the wrist or as a pendant, although wearing it on the wrist is recommended for sleep tracking. The device has multiple sensors that can measure the amount and quality of sleep, and it can also detect noise and snoring. The sleep tracking feature on the Fitbit provides a Time Asleep duration, which is calculated by deducting the time spent restless or awake from the overall tracked sleep time. This allows users to better understand their sleep patterns and make changes accordingly.
| Characteristics | Values |
|---|---|
| Ease of Use | Easy to use as it is always on your wrist |
| Data Accuracy | Quite accurate compared to other popular sleep trackers |
| Data Analysis | Provides a Time Asleep duration, rather than general sleep duration |
| Customisation | Basic notification system with potential for better customisation |
| Design | 30% smaller than the old model |
| Waterproof | Yes |
| Snore and Noise Detection | Yes |
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What You'll Learn
Fitbit Flex's accuracy in tracking sleep
The Fitbit Flex 2 is an upgrade to the original Fitbit Flex, which was an entry-level, discreet tracker that performed the basics of activity and
The Fitbit Flex 2 can be worn on the wrist or as a pendant, but sleep tracking is only available when worn on the wrist. The device automatically detects your sleep when you wear it to bed, and you can view your sleep pattern in the Fitbit app. The sleep pattern includes your time spent awake, restless, and asleep. The time asleep is calculated by subtracting the time spent awake and restless from the overall tracked sleep time.
The Fitbit Flex's sleep tracking accuracy has been compared to that of other popular sleep trackers on the market. According to a study by the National Institutes of Health in the US, Fitbit sleep monitoring was found to be more accurate in measuring sleep duration and equally accurate in estimating light sleep and deep sleep stages.
To ensure optimal accuracy in sleep tracking, it is recommended to wear the tracker correctly, which typically means wearing it on the non-dominant wrist with a snug fit. Additionally, setting a sleep goal allows Fitbit to compare your actual sleep to the ideal amount of sleep. For more detailed data, the Sleep Insights feature provides insights into the correlation between sleep and other activities.
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How to use the Fitbit app to track sleep
The Fitbit Flex is always on, so it is easy to use the sleep tracker. It automatically detects your sleep when you wear your device to bed. It is recommended that you wear your device in a snug wristband during sleep. The Fitbit app can be used to track your sleep patterns and quality.
To track your sleep using the Fitbit app, you need to sync your Fitbit tracker or watch with your smartphone. Open the Fitbit app and go to the 'Today' tab. Here, you can see your total sleep duration from the previous night, as well as your Sleep Score. You can also swipe left on the Sleep Tile to see the previous night's detailed data and your sleep history for the week.
To check your sleep stats for other days, you can choose the desired week, month, or year using the tabs. Tap on a specific sleep session to check your sleeping heart rate for that period. Touch and hold the chart, then drag left or right to check your sleep details.
The Fitbit app also allows you to edit or delete a sleep log. To do this, go to the Sleep Duration tile on the Today tab and tap the menu icon, then select 'Edit sleep'. Choose the sleep session you want to edit or delete.
The Fitbit app also offers a Sleep Profile feature, which provides a more detailed breakdown of your sleep. However, this feature is only available on specific models and requires a Fitbit Premium subscription.
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Fitbit's sleep tracking capabilities and how they can be improved
Fitbit's sleep-tracking capabilities have been a feature of its devices for quite some time. The Fitbit Flex 2, for example, automatically tracks sleep when worn on the wrist. It records the time spent awake, restless, and asleep, and this data can be viewed on the Fitbit app. The app also provides a monthly sleep profile, which offers a detailed breakdown of sleep data.
The Fitbit's sleep-tracking feature is quite accurate compared to other popular sleep trackers on the market. A study by the National Institutes of Health in the US found that it was more accurate in measuring sleep duration and equally accurate in estimating light sleep and deep sleep stages. The Fitbit's sleep tracking can also be used to understand how activities like exercise, diet, and stress levels impact sleep.
To optimise the sleep-tracking capabilities of a Fitbit, it is recommended to wear the device correctly. This includes wearing it on the non-dominant wrist and ensuring a snug fit. Additionally, setting a sleep goal allows users to compare their actual sleep to the ideal amount. The Sleep Insights feature provides more detailed data about sleeping habits.
While Fitbit's sleep tracking is useful, there are areas for improvement. The device could provide guidance on improving sleep quality, similar to Jawbone's Smart Coach feature. Additionally, customisation options for notifications could be enhanced, allowing users to customise how the LEDs light up for different callers.
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How to improve sleep quality using the Fitbit app
The Fitbit Flex 2 is a popular fitness tracker that can help you improve your sleep quality. Here are some tips to improve your sleep quality using the Fitbit app:
Wear the Tracker Correctly
Ensure that you wear the Fitbit tracker correctly for optimal accuracy. This means wearing the device on your non-dominant wrist, with a snug fit that is not too tight. The device should not be worn as a clip or pendant accessory, as this will interfere with sleep tracking.
Set Sleep Goals
Set a sleep goal in the Fitbit app so that you can compare your actual sleep to your ideal sleep. This will help you identify areas where you need improvement and set reminders to get back on track.
Explore Sleep Insights
Utilize the Sleep Insights feature to gain a deeper understanding of the correlation between your sleep and other activities. This can help you identify patterns and make informed decisions to improve your sleep quality.
Analyze Sleep Data
Use the Fitbit app to analyze your sleep data, including sleep duration, sleep stages, and sleep heart rate. Compare your sleep patterns with your daily activities, exercise, diet, and stress levels to identify any factors that may be impacting your sleep.
Customize Settings
Customize your Fitbit settings to personalize your sleep tracking experience. You can configure when SmartTrack starts and enable swim tracking if you want to track your swimming workouts. Additionally, explore the sensitive mode setting if you want your device to record more movements as restless or awake.
By following these steps and using the data and insights provided by the Fitbit app, you can make informed decisions about your sleep habits and work towards improving your sleep quality over time.
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Fitbit's sleep tracking compared to other devices
Fitbit's sleep-tracking features include nightly trends and trends over time, a silent alarm that vibrates to wake you during your optimal sleep stage, bedtime reminders, sleep goals, and more. The Fitbit app provides your total sleep time and your time spent in each sleep stage, which creates your Sleep score. Fitbit devices that track heart rate (except Charge HR and Surge) also track sleep stages.
Fitbit's sleep tracking has been compared to that of other devices in several studies. A 2017 study compared a polysomnography with the performance of a Fitbit Charge 2 in 35 adults. Researchers found the Fitbit device detected sleep onset with 96% accuracy but overestimated time spent asleep by 9 minutes on average. In the study, the Fitbit detected light sleep with 81% accuracy, deep sleep with only 49% accuracy, and REM sleep with 74% accuracy. A newer study published in April 2022 compared the performance of the Fitbit Alta HR to results from an EEG conducted simultaneously on 40 college athletes while sleeping. This study found Fitbit data to satisfactorily track sleep onset, time spent asleep, and sleep cycles.
The Oura Ring has been found to offer the best combination of accessible data, useful guidance, and comfort. The Whoop 4.0 is also a good option for sleep tracking, as it measures your four sleep stages (slow wave, awake, REM, and light) and suggests optimal sleep times based on the sleep data it collects. The Apple Watch Series 8 is intuitive and seamless with other Apple devices, but it is uncomfortable to wear while sleeping and does not always accurately measure sleep time.
The Fitbit Inspire 3 is a good choice if you want to track your workouts and are curious about your sleep. It uses heart-rate sensors and motion detectors to track your activity and energy output, and it offers the most accurate fitness tracking. However, testers have found its sleep tracking to be inaccurate. The Fitbit Flex 2 is another option, which is waterproof and offers some smartphone notifications in addition to basic activity and sleep tracking.
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Frequently asked questions
The sleep tracking on the Fitbit Flex is quite accurate compared to other popular sleep trackers on the market. According to a study by the National Institutes of Health in the US, it was found to be more accurate than other fitness trackers when measuring sleep duration and just as accurate as other devices when estimating light sleep and deep sleep stages.
To track your sleep with the Fitbit Flex, you must wear the device during sleep. Wrist-based Fitbit devices automatically detect your sleep when worn to bed. It is recommended to wear the device on your non-dominant wrist, with a snug fit. You can also set a sleep goal in the Fitbit app so that it can compare your actual sleep to your goal.
The Fitbit Flex calculates your time asleep by subtracting the time you spent awake and restless from your overall tracked sleep time. For example, if you slept for 8 hours but woke up twice for 15 minutes each, your time asleep would be 7 hours and 30 minutes.
