Apple Watch / Strava / Activity

[WarrenB]

Noticed an odd issue tonight. Been out for a little hill walk and recorded it on Strava on my Apple Watch. Got back to the car, finished the work out and it synced with Strava as normal. Looked at my watch and it said I'd burnt 660Kcal on the activity rings. All good. Checked the Strava app to see my times in a bit more detail and looked back at my watch before I set off and the activity ring rolled back to 580Kcal.

Any reason why it'd do that? The Strava activity is listed as a workout so it has counted it, just don't know why it'd roll back afterwards? I did wonder if both Strava AND the watch were counting the calories at the same time and it had just deleted one, but it'd be a lot higher before it deleted one surely?

Not that I'm that bothered by it, except I'm a bit too competitive for my own good so I am quite bothered by it....but not really

[Gren]

Is it possible that one was a total measure of calories used and the smaller one was the 'additional' calories burned by the activity? i.e. Subtracting what you would have burned anyway.

[somouk]

Likely down to the formula used to calculate calories used and values for weight etc entered in to the apps. The watch will have tracked your calories how it thinks you burnt them, then when the Strava activity sync'd the fitness app is clever enough to recognise the same timeframe and adjust the calories based on how the activity shows up in external app.

[WarrenB]

That is possible. Just checked and my weight is different on Strava than the Health app on the phone. Only out by 10lbs though so wouldn't have thought it'd make that much difference. I'll see how it goes the next time I go out.

[WarrenB]

Did the same hill walk tonight with the correct and matching weight data in Strava and it only rolled back about 10 kcal at the end. That's good enough for me!