After resetting fitness calibration data on Apple Watch calorie tracking is showing incorrect data

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Level 1

4 points

After resetting fitness calibration data on Apple Watch calorie tracking is showing incorrect data

Ever since I clicked on reset fitness calibration data, my calorie tracking is showing incorrect data. For example, I used to burn 500 calories in a treadmill brisk walk, 5.5kmph speed, 5 incline and avg heart rate of 132bps. Now it shows just 300 calories or less for 135bps! I walked outdoor for 20 mins and even ran for 20mins for atleast 6 times over the last week. I also unpaired and repaired the iPhone. Still no improvement in data. I checked online calculators and with my age, height and 135bps walk, avg calorie burn is around 700! So I know that the watch data is most certainly wrong.

[Re-Titled by Moderator]

Original Title: Incorrect calorie tracking after resetting fitness calibration data

Apple Watch Series 7

Posted on Jun 22, 2025 10:17 AM

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Answer 1

Jun 25, 2025 2:55 AM in response to shetul16

Did you try to unpair the watch and set it up again as a new device, without using the latest backup?

Unpair and erase your Apple Watch - Apple Support

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Answer 2

Jun 26, 2025 12:11 AM in response to shetul16

The hardware of the watch needs software that is correctly working. The backup data also contains software settings which are needed to convert your workout data into visible data, like calories etc.

Not using the backup data will make sure, that no damaged parts of the software are imported back.

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Answer 3

Jun 25, 2025 6:04 AM in response to shetul16

Setting it up as a new device will make sure, that the issue is not part of the backup data.

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Answer 4

Jun 23, 2025 3:55 AM in response to shetul16

Did you check, if your watch is set as the first Data Source in the Health App/Workouts/Data Sources & Access/Data Sources?

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Answer 5

shetul16 Author

Level 1

4 points

Jun 23, 2025 3:13 AM in response to Ingo2711

Using default apple workout app only. Other apps have ready only right. No writing rights.

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Answer 6

shetul16 Author

Level 1

4 points

Jun 23, 2025 5:13 AM in response to Ingo2711

Yes all checked. I think the issue is with the watch itself. Why would watch show lower calories for same workout like outdoor walking and running compared to before reset. Moreover as mentioned for my height age and heart rate during workout, calories are significantly higher

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Answer 7

shetul16 Author

Level 1

4 points

Jun 25, 2025 4:34 AM in response to Ingo2711

No I restored existing backup but after a reset on calibration. Will not restoring backup really help? If I have reset calibration, isn’t that as good as setting up new device? How will setting up as a new device help me?

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Answer 8

shetul16 Author

Level 1

4 points

Jun 25, 2025 12:21 PM in response to Ingo2711

Help me understand how the workout works. I thought a workout in a watch is independent of health app or backup data. Meaning after each workout we can see the time, avg heart rate, active and total calories. This is calculated independently by watch sensor. I feel after deleting calibration data, the sensors and trackers are incorrectly tracking my active calories in watch itself. What’s backup data got to do with it?

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