Garmin,
The problem: Apple Health and iOS app Livestrong MyPlate are reporting an outrageously high number of calories burned during an ordinary day of activities, usually 2-3 times the actual calorie burn displayed in Garmin Connect, and infrequently between 5 and 10 times the amount displayed in Garmin Connect.
In short: I use LiveStrong MyPlate to track my calorie intake against my activities. MyPlate enables me to visualize my intake against energy output from cycling and running. I believe LiveStrong MyPlate reads "Active Energy" data from Apple Health.
My theory on the cause of the problem: Garmin Connect is over reporting calories burned to Apple Health, or is reporting them in duplicate.
Supporting data from April 9, 2020:
Total active calories reported on-screen by Garmin Connect: 717
Total calories reported burned during one road cycling event: 414
Difference between calories reported by Garmin Connect, and road cycling event: 303 (expected, as this is likely due to steps recorded by the Garmin watch)
Please see attached images for supporting screenshots.
Data reported to Apple Health by Garmin Connect:
Apple Health Calorie Value | Number of times appearing | Total |
1412 | 1 | 1412 |
1393 | 1 | 1393 |
31 | 8 | 248 |
414 | 8 | 3312 |
43 | 8 | 344 |
130 | 8 | 1040 |
77 | 8 | 616 |
Total Calories Reported >>> | 8365 |
Devices used:
Apple iPhone Xs, running iOS 13.4
Garmin Edge 530, running Software Version 5.10
Garmin D2 Delta PX, running Software Version 5.40
Software used:
iOS app: Garmin Connect 4.29.1
iOS app: Livestrong MyPlate 5.25.2