Apple Watch Calorie Tracking

I've been tracking my ski days with my Apple Watch SE. I ski around 50km (31 miles) a day across roughly 7 hours of skiing. Despite this amount of skiing, my watch says I've burnt anywhere from 800 to 1200 calories in a day.

When look around online at the number of calories burnt while skiing, it always seems like the number tracked from my watch should be much higher.

I'm wondering if my watch is just coming in low, and the real number is likely to be much higher?
 
The watch also tracks heart rate - you could refer to that during the activity and see how high and long your breathing gets. Could be a simple gut check to compare it to other actives you track. For me, my heart rate never gets above like 145 even on a big in-resort pow day. When I'm backcountry skiing or mountain biking, my heart rate will max around 180, so I'm definitely burning fewer calories resort skiing...
 
Completely sourceless AI-ass articles aren't the best source of reliable information.

Solution: hike rails until your calorie data lines up.
 
Apple Watch tracking goes to complete shit when you ski. It has no clue what’s going on. I always wear mine and it never seems accurate
 
The thing to remember is of those 7 hours how long are you sat on a lift doing basically nothing? Skiing, especially at a resort is not really a big cardio workout.
 
Bunch of numbers here:https://www.dhs.wisconsin.gov/publications/p4/p40109.pdf

It seems like it is per hour of activity, i.e., actually skiing down, not sitting on a chairlift. For me, this represents about 15-25% of my total time at the resort.

I think activity trackers are not well suited to capture skiing fitness. They mostly focus on cardio (heart rate) or minutes of movement, while skiing is mostly about intensity (strength and power) in order to sustain high-Gs in a turn, jump high, absorb a landing, absorb/push in moguls, jump turn, etc.
 
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