Workout Kalorien sind falsch

Hello,

I have the following problem with my new Apple Watch Ultra 2.

I went for a few hikes and I had the watch on. It was tracking everything properly and when I review the workout afterwards, I can see that all metrics except for the total calories burnt are correct. The heart rate is recorded accurately, all elevation data is there, the gps track is spot on - but the calories burnt are way too low.

For example, I went on a brief hike this morning and did 434 metres in 51 minutes. I had an average heart rate of 150 bpm. The workout app shows 293 active calories and 409 total calories.

I use this route all the time and I used to track it with my Garmin Epix. Usually I would burn about 800 calories on this route, and this is also the result I get from various calculation websites.

I have tried all these steps here already Get the most accurate measurements using your Apple Watch – Apple Support (UK) - all my user data is correct, I have calibrated the watch, etc.

Anybody knows what else to do??

Thank you!