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Calories difference between fit bit and Garmin

I have only had the Garmin for a few days while I had a fit bit for 6 months and I am now wearing both one on each arm.

I have only done a few sessions of weights and HIT treadmill running and on both days there is around a 750 calorie a day difference !?

Fit bit had me around 3800 calories

Garmin had me around 3050 calories

my concern is when I up my training the calories difference will grow even larger to the point that I might as well be guessing.

Most other metrics are similar like RHR and Vo2max as well as peak heart rate kinda matching so I am confused.

The one difference is Garmin seems to have me at a lower gentle movement or general movement HR compared to Fit bit sometimes 20 beats different!?

0 ovekvam over 3 years ago in reply to Adam Read

What was the reported calories for each activity, and how many resting calories?

0 ovekvam over 3 years ago in reply to ovekvam

Just had an idea here, since you come from FitBit. Are you actually starting activities on the watch, or are you using automatic exercise recognition?

0 Adam Read over 3 years ago in reply to ovekvam

I guess I am using automatic exercise recognition which doesn’t seem to pick up my walks very accurately today and it seems to miss out steps when my phone had no signal.

I would say I have walked 15km plus today and yet it only has me at 13,000 steps and again even walking 15km it seems I will only end up burning 2400-2500 total calories today.

0 ovekvam over 3 years ago in reply to Adam Read

I recommend using manually started activities. That will give you a lot more logging data and accuracy.
The step count does not have anything to do with the phone. My watch is almost never connected to the phone.

0 Adam Read over 3 years ago in reply to ovekvam

Thanks. I will try manually starting activities today.

0 Adam Read over 3 years ago in reply to ovekvam

That made a bit of a difference so a hour of strength training and 15,000 steps had me at a total of just under 3000 calories which seems more reasonable.