Evie Summers
The Apple Watch is a popular tool for tracking calories burned, and it can also be used to track calories burned while sleeping. The watch uses a combination of sensors, including a heart rate monitor, motion sensors, and personal data like age, weight, height, and gender to estimate calorie burn. While the watch is generally considered accurate, it's important to remember that it provides an estimate rather than an exact measurement. Users can improve accuracy by keeping their personal information up to date and calibrating their watch.
| Characteristics | Values |
|---|---|
| How to track calories burned while sleeping | Open the Sleep app on your Apple Watch and scroll down to see the amount of sleep you got, the time spent in each sleep stage, and your sleep average over the last 14 days. |
| Track calories burned | The Apple Watch tracks active calories burned and your progress towards your daily goal. |
| Track total calories burned | The Apple Watch also tracks your total calories burned, which is your active plus passive calories. |
| Passive calories | The set amount of calories your metabolism burns while you are alive, even if you are not physically active. This is called your base metabolic rate. |
| Accuracy | The Apple Watch is generally considered quite accurate for tracking calories burned, with studies showing it is accurate within 10-15% of actual calories burned. |
| Factors affecting accuracy | The accuracy of the Apple Watch's calorie tracking depends on various factors, including heart rate monitoring, motion sensors, and personal data such as age, weight, height, and gender. |
| Improving accuracy | To improve the accuracy of calorie tracking, users can ensure their personal information is up to date in the Health app, wear the watch snugly on the wrist, and regularly calibrate the device. |
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What You'll Learn
Accuracy of Apple Watch's calorie tracking
The Apple Watch is a useful device for tracking calories burned, and it does so in two ways: through your body's maintenance at rest, and through additional calories used during exercise. The watch uses your heart rate and biometric data to calculate how many active versus total calories you burn throughout the day. It is important to note that the watch will only record exercise minutes if your heart rate goes above a certain threshold, which is believed to be around 130 bpm.
The Apple Watch is considered to be quite accurate at calculating calories burned, but this is dependent on several factors. Firstly, it is crucial that your personal information, such as height, weight, gender, and age, is correctly entered into the Health app. This information is used by the watch to estimate your calorie burn, so incorrect data can lead to inaccurate results. Additionally, calibrating your Apple Watch's motion and distance tracking can improve accuracy. This includes calibrating the watch to learn your fitness level and stride.
The accuracy of the Apple Watch's calorie tracking has been the subject of various studies, with mixed results. One 12-week study conducted in 2019 found a strong correlation between the predicted calorie deficit according to the Apple Watch and the participant's actual weight. The watch's EE (energy expenditure) numbers were very close to the actual weight loss achieved during the study. However, another study showed that the Apple Watch could be off by up to 40% when estimating calorie burn.
It is worth noting that the Apple Watch may not be able to perfectly detect the specific activity you are doing, which can affect the accuracy of calorie tracking. For example, it may not differentiate between walking and running, which have different calorie burn rates. Therefore, it is recommended to select the activity from the Workout app that most closely matches your exercise to improve tracking accuracy. Additionally, ensuring a proper fit for your Apple Watch is important, as a poorly fitting watch band can interfere with heart rate accuracy.
In conclusion, while the Apple Watch provides a convenient way to track calories burned, it may not always be entirely accurate. To improve accuracy, it is essential to input correct personal information, calibrate the watch, and select the appropriate activity during workouts.
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How to calibrate your Apple Watch
Calibrating your Apple Watch ensures that it performs optimally and provides the most accurate data. Here is a step-by-step guide on how to calibrate your Apple Watch:
Step 1: Check Your Settings
On your iPhone, open the Settings app and tap Privacy > Location Services. Ensure that Location Services is enabled. Then, scroll down and tap System Services. Make sure Motion Calibration & Distance is turned on. These settings are crucial for accurate tracking, as they allow your Apple Watch to learn your stride and fitness level, improving the precision of calorie, distance, and pace calculations.
Step 2: Prepare for Calibration
For accurate calibration, find a flat, open outdoor area with good GPS reception and clear skies. If you own an Apple Watch Series 1 or earlier, bring your iPhone for connected GPS. You can hold your iPhone or wear it on an armband or waistband.
Step 3: Calibration Activity
Wear your Apple Watch and open the Workout app. Select an Outdoor Walk or Outdoor Run, depending on your preference. Start the activity and maintain a steady pace for at least 20 minutes. If possible, repeat this process with the opposite workout type. For example, if you initially chose an Outdoor Walk, try an Outdoor Run next.
Step 4: Compare Results (Optional)
If you want to assess the calibration's impact, you can compare the results with previous records. Open the Fitness app on your iPhone, access the Activity section, and tap the Calendar icon to select a reference date. This will show you how the tracking has changed over time.
Step 5: Update Personal Information
Accurate personal information, such as height, weight, age, and gender, is essential for precise calorie calculations. Open the Watch app on your iPhone, tap the My Watch tab, and go to Health > Health Details. Tap Edit to update your personal details. Regularly updating this information, especially if your body composition changes, ensures that your Apple Watch provides relevant and precise data.
By following these steps, you can calibrate your Apple Watch to improve its accuracy in tracking your fitness and health metrics.
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How to check your sleep history
To check your sleep history on your Apple Watch, you must first ensure that sleep tracking is enabled. To do this, open the Health app on your iPhone and tap 'Browse' at the bottom of the screen. Then, tap 'Sleep'. If you have Sleep saved to your Favourites list, you can access it from the Summary page in the Health app. From here, tap 'Full Schedule & Options', and then tap 'Wind Down' or 'Sleep Goal' under 'Additional Details'. Adjust your time, and then tap 'Wind Down' or 'Sleep Goal' again to save your changes.
Next, open the Sleep app on your Apple Watch. You can do this by opening the Sleep app on your iPhone and tapping 'Get Started' under 'Set Up Sleep', and then tapping 'Next'. You can also look for a bed icon with a greenish-blue background on your Apple Watch. Once you've opened the Sleep app, turn the Digital Crown to view your Sleep Stages data, Time Asleep, and your Sleep Duration for the last 14 days. By default, the bar graph will be set to 'D' for daily. Tap 'W' at the top of the chart to view your sleep history for the past week, 'M' for the past month, or '6M' for the past 6 months.
You can also ask Siri "How much did I sleep last night?" to get a verbal update on your sleep history.
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How to update your personal information
To track calories burned while sleeping, you need to have your Apple Watch on your wrist. The Apple Watch uses your personal information, such as your height, weight, gender, and age, to calculate how many calories you burn.
- Open the Watch app on your iPhone.
- Tap the "My Watch" tab.
- Tap "Health" and then "Health Details".
- Tap "Edit".
- Tap the item that you want to change.
Your Apple Watch will also track your total calories burned, which includes both active and passive calories. Active calories are those burned from movement, while passive calories are the amount burned by your metabolism simply from being alive, also known as your base metabolic rate (BMR). To see your total calories burned for multiple days, tap the calendar icon in the top right corner of your screen.
To track your sleep, open the Sleep app on your Apple Watch and scroll down. This will show you the amount of sleep you got the previous night, your sleep average, and the time spent in each sleep stage.
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How to track your total calories burned
The Apple Watch is a popular tool for tracking your calorie burn throughout the day. It can also track your total calories burned, which is the sum of your active and passive calories. Active calories are those burned through movement, while passive calories are the number of calories your metabolism burns just to keep you alive, even if you've been sedentary all day. This is also known as your base metabolic rate.
To track your total calories burned, you can use the Apple Watch's Workout app. This app uses the watch's accelerometer, heart rate sensor, and GPS to track your movement and heart rate, which are key factors in calorie calculation. The watch also takes into account your personal information, such as your height, weight, age, and gender, to provide a more accurate estimate of your calorie burn.
To ensure the most accurate measurements, keep your personal information up to date in the Health app. It's also important to wear your watch with the right fit—snug but not too tight—and to calibrate it regularly.
In addition to tracking your active and passive calories, the Apple Watch can also provide insights into your sleep. The watch can measure your sleep stages, allowing you to see the amount of sleep you got, the time spent in each sleep stage, and your sleep average over the last 14 days.
While the Apple Watch is generally considered accurate for tracking calories burned, it's important to remember that it provides an estimate rather than an exact measurement. The accuracy of the calorie burn estimate may vary depending on the type of activity and individual characteristics.
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Frequently asked questions
Your Apple Watch will automatically track your sleep stages and the calories burned while you sleep. To view this data, open the Sleep app on your Apple Watch or the Health app on your iPhone.
The Apple Watch is generally considered quite accurate for tracking calories burned, especially compared to other fitness trackers. Studies show that the Apple Watch’s calorie tracking is generally accurate within 10-15% of actual calories burned. However, it's important to remember that it provides an estimate, not an exact measurement.
The Apple Watch uses a combination of factors to estimate calorie burn, including your age, height, weight, heart rate data, and movement throughout the day. It also uses accelerometers and gyroscopes to track your activity levels.
To improve the accuracy of your Apple Watch's calorie tracking, ensure that your personal information (such as height, weight, age, and gender) is up-to-date in the Health app. Additionally, calibrate your Apple Watch regularly and wear it snugly on your wrist to enhance its performance.
