Active Calories recorded by Edge 830 + Power Meter are overwrited by Hrm-Pro

Yes, i woke up at 4:00 am and went to the grid at 5 am and the race started at 6 am.

The day before i went for 1 hour easy cycling and the day before that one i was off. Basically there was nothing to recover. But still there were 2000 calories more just after the race.

But man, i can give you more examples were the total calories are even LESS than those of the activity

I already told to a friend of mine to run my same test tomorrow

Look at your HR daily data for the concerned day, and the Resting HR on the same day. Then check how far above the RHR you were during the hours before the ride, and that will give you an idea when you generated Active Calories. The more the HR is above the RHR, and the higher stress detected through the HRV, and the higher respiratory rate, the more active Calories you burn.

Data from you friend is completely irrelevant, since he has completely different values throughout the day.

Today i made another test.

0) Woke up 6am, active calories in Calories details on connect were 0

1) I switched off Bluetooth and Wifi on my Edge 830

2) I went for a ride with Edge 830 (with power meter) + HRM-Pro

3) After the ride my HRM-Pro Synched with Garmin Connect. These were the results.

Is it correct to say that with only HRM-Pro data i burned 544 active calories?

4) After that i swiched on Bluetooth and Wifi on Edge 830 and let it synch the activity with Garmin Connect. These were the results

This is the activity overview

In particular

760kj

759 active calories

124 resting calories

883 total calories

By taking into account the active calories of the previous screenshots

1253 - 544 = 709 that is not equal to 759 active calories recorded in the activity.

What is going on?

Please note that the active calories calculated by the HRM-Pro data were lower than those calculated by the Edge 830 + Power Meter.

I do not quite understand why you are syncing the activity twice - once with the HRM-Pro, and the separately with the Edge. If it is just for the testing, then it is all right, but you should not do it otherwise. In this way it is not surprising you get some data double-counted. Correctly, the HRM-Pro should be connected to the Edge, and you need to sync only the Edge. HRM-Pro delivers the necessary HR data directly to Edge.

scalax said:

Please note that the active calories calculated by the HRM-Pro data were lower than those calculated by the Edge 830 + Power Meter.

Yes, but that is to great extent because the data recorded by the HRM-Pro cover shorter time than Edge for some reason (possibly started to record only once you got sweaty, or because it dropped the HR signal at some point, ...). See the difference in Resting Calories - 634 at HRM vs 683 at the Edge. For the same reason also the direct subtracting of the values cannot work. You have to take the duration of both data sets into the calculation too. 

trux said:

I do not quite understand why you are syncing the activity twice - once with the HRM-Pro, and the separately with the Edge. If it is just for the testing, then it is all right, but you should not do it otherwise. In this way it is not surprising you get some data double-counted. Correctly, the HRM-Pro should be connected to the Edge, and you need to sync only the Edge. HRM-Pro delivers the necessary HR data directly to Edge.

HRM-Pro must be added to Garmin Connect as a standalone device to track intensity minutes, steps, all-day hearth rate and calories data. You add it to the Edge 830 so it gives the HR data to the Edge activity but all other data are synched directly from the HRM-Pro to Garmin Connect.

I'm not synching the activity twice, i'm just letting it synch different data in different moments for testing purpose since i noticed this explosion in calories count.

trux said:

Yes, but that is to great extent because the data recorded by the HRM-Pro cover shorter time than Edge for some reason (possibly started to record only once you got sweaty, or because it dropped the HR signal at some point, ...). See the difference in Resting Calories - 634 at HRM vs 683 at the Edge. For the same reason also the direct subtracting of the values cannot work. You have to take the duration of both data sets into the calculation too. 

This is not the case as you can see from Garmin Connect resume there is no missing data.

Last but not least the difference in resting calories was due to to the fact that i took the screenshots, after the ride, at the distance of 20 minutes (as you can see from the timestamp in the top right corner). I can run the same test tomorrow and you will see the same discrepancy.

trux said:

I do not quite understand why you are syncing the activity twice - once with the HRM-Pro, and the separately with the Edge

Please note that i turned off bluetooth and wifi on Edge 830 but the HRM-Pro was connected to the Edge 830 via Ant+

Just to make sure - do you have the Physio TrueUp feature enabled both on the Edge, and on the Fenix? 

trux said:

Just to make sure - do you have the Physio TrueUp feature enabled both on the Edge, and on the Fenix? 

Yes, absolutely.