Hello @SkiStra 

Thanks for posting about this.  

Strava shows calories as they were provided to us by upload partners. If no value is sent, or you record with the Strava mobile app, we use our own calculations. At this time, Strava only performs a calorie calculation on a ride, run, walk, and hike activities. All other activity types will not display calories unless the upload partner includes the data with the activity upload.

You don't mention what device or App you used to record these roller ski activities, but based on the above it sounds like the calorie count is coming from the upload partner, since we don't do our calculations for calories on roller ski activities.  Read more about calorie calculation here.  

If those calorie counts are coming from whatever third part App or device you're using to record, any questions about the calorie value would need to be directed to them.

Let us know if you have any questions about this or if we can help in any way.

About calories discrepancy… I’ve recorded a 2h43m walk on Strava while wearing a Wahoo chest monitor for HR. The total calories burned was 1416, which seemed a bit high to me. So I tried to imput all the data of my activity as well as my personal data in different other activity apps and in a couple of online calculator. I’ve also asked AI. All of these gave me a result of 600/800 calories. Why does Strava overstimate the calories expenditure so much? Can it be fixed?

🤔 🤔 ok… thank you??? I guess?