Outdoor Cycle calorie discrepency

[Cryates]

So, here's the deal and I'm hoping someone here can help. Today I restored my phone from an iCloud backup (to remove the iOS 12 beta) and I believe it had to do something to my Apple Watch as well. Not sure if it was full reset or not, but it was definitely doing something. Anyways, tonight I did an outdoor cycle workout and noticed the active calorie count is way different vs comparable cycle workout I did a few days back with the same watch. I have not changed any body weight measurements, etc in the health app. Also, this time last year I was getting similar results to what I did today, like 600+ calories in a similar timespan and pace with a S2 watch.

Any idea what could be going on? I've got two images below. One from today and one from Saturday (which is similar to the result I've been getting for the past two months on this watch) ... but on my S2 last year I was getting similar results to what I got today.

 

[neutrino23]

I can't help you but, we can add to the mystery. My wife has seen similar issues. She has an S0 watch and I have an S3 watch. When I cycle I get almost one minute credit for the exercise ring as clock minutes of riding time. My wife gets less than a third of that. She went to the Apple store and they agreed it was off but weren't sure why. She changed the Workout App face to not show riding speed and she claims it is giving her more credit for exercise minutes. We haven't pinned it down but something odd is going on.

I'm guessing you already tried to unpair/pair the watch and restart it. We tried that but it didn't seem to change things.

 

[Cryates]

Yep, I tried that. I also get one exercise minute for each ride minute. Hmmm. Mystery indeed.

 

[neutrino23]

We wondered if there was a setting that would modify the response depending on the person. It would make sense that a tall, heavy person would burn calories faster in a workout than a short, thin person. Maybe there are age differences as well. We have not found any documentation on this.