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Resting Calories the same every day

I am new to Garmin wearables so please bear with me.

I have the Fenix 6 for 3 days now and set up my profile with my weight, height, activity class etc. I haven't had a chance to go for a run yet, but my Resting Calories seems to be the same every day (1916 for all three days). For my height and weight, age etc, it should be around 1550.

Does Garmin overestimate the RMR? And why is it exactly the same for all 3 days so far?

Do I have to go for a run to "calibrate" this reading? How does it work exactly? Surely I can't have EXACTLY the same RC every day.

The Active Calories appears to be more realistic though

Any help would be appreciated into understanding why this is the case.

0 trux over 4 years ago

Dani Y said:
And why is it exactly the same for all 3 days so far?

Why would you expect the RMR changing every day? Unless you adjust the weight (or the gender, height, age) every day, the RMR will be identical. Also RMR is not equal to BMR, it is slightly higher.

0 Dani Y over 4 years ago in reply to trux

OK so I thought the watch recorded Resting Calories live. For example right now (7:30pm) my Resting Calories Is at 1592. This will inevitably end up at 1916 like the previous 3 days. Hence my confusion.

I'm just trying to understand. In any case 1916 is a bit high for me

0 trux over 4 years ago in reply to Dani Y

Dani Y said:
OK so I thought the watch recorded Resting Calories live.

That's not possible without a really sophisticated lab equipment. The RMR is estimated based on your body parameters, and hence if they do not change, the RMR will not change either. Only active Calories are being measured with the help of the HR and HR Variability.

Dani Y said:
In any case 1916 is a bit high for me

You cannot really know without a lab test. If you try some online RMR calculators, you will get 10 different results at 10 different websites. If Garmin chose a higher estimate, it was probably for a reason.

0 4144875 over 3 years ago

This also confuses me. It seems that if you sleep, you burn as many calories as if you work in front of the computer or play video games. This is strange to me because my old Fitbit showed on a nice graph how many calories I burned in every 15 minutes throughout the day. This was based on HR and when I ate, worked in the office or played video games, I burned more calories than when I was lying on my bed. Practically from the time I woke up, the amount of calories burned clearly changed compared to when I was sleeping. There were really no resting or active calories the whole day was calculated in calories based on the sensors, no matter what I was doing. It seems that the base was BMR and it added calories whenever my heart rate accelerated. And not like Garmin which makes up its own RMR and adds moments of sports activity. I've only had the Garmin for a short time so maybe I'm missing something and have yet to see a formula by which it determines RMR.