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Change to Resting Calorie calculation?

Former Member
Former Member
So last night, before I went to bed, I checked my calories burned on my Vivofit. It was close to 2500. This morning after I synched to Garmin Connect, my recorded data tells me I burned a total of 2007 calories for the day.

WT? How did I lose 500calories overnight?

When I look on the app, it tells me I only burned 1444 resting calories. Is Garmin trying to tell me that's my BMR? Because it's not.

Up until 2 days ago, I notice that it was a constant number (which is very close to my actual, measured BMR). But the last 2 days, it is sitting in the 1400s.

Has there been a change to the way Resting Calories are calculated?

Can someone please explain this to me?
  • Former Member
    0 Former Member over 9 years ago
    Just to add as well, you can turn off negative calorie adjustments in the MFP settings, if that helps.
  • Former Member
    0 Former Member over 9 years ago
    Just to add as well, you can turn off negative calorie adjustments in the MFP settings, if that helps.


    I hear ya. Realize nothing is 100% accurate but at least a solid and consistent baseline helps!

    From what I can tell, garmins resting cals are actually the St jeor bmr formula and then multiply by 1.2 (sedentary). Mfp uses same formula but factors in 1.25 for sedentary. https://myfitnesspal.desk.com/customer/portal/articles/1375583-a-message-about-myfitnesspal-s-updated-nutrition-goals

    I tweaked my age in connect so the bmr would equate to the same cals/min that mfp uses. That helps keep the negative adjustments from causing too much issues.

    I am monitoring my progress but am suspect that the general activity step calories are a bit low but hard to say.
  • Former Member
    0 Former Member over 9 years ago
    Thanks darrencroton.

    Yes, I have the red clock indicating time zone change. According to the graphs for the last 2 days, I didn't move at all from 5:30pm to the end of the day - apparently I didn't even go to sleep, LOL. .

    Because I'm using my Vivofit, there's no charging, no switching it off. It should be recording all day, just like every other day since before the 23rd. It recorded all day long perfectly fine.

    So it's a problem with the GC platform then? They're tweaking? Again.

    I appreciate GC, really I do, but it's a frustrating PIA when I have been using those estimated calories burned. Right, so until Garmin fix it (hint hint Garmin), I will just use my usual BMR guestimate (which is around 1978) and add on my active calories. Garmin seems to have short changed me, again.

    Good thing I'm not too OCD about some of this :cool:
  • Former Member
    0 Former Member over 9 years ago
    Did you also notice, that you are way over your 100% goal with your steps? A few days ago it told you how many percentage point you were over reaching your gaol.

    I have the same problem with the BMR since Saturday. It's going down and then a little bit up..
  • I've had the same problem 3 days straight. It seems random.
  • Former Member
    0 Former Member over 9 years ago
    I just noticed this issue, too. I had a steady 1594 to 1600ish BMR up until 3 or so days ago.

    The data on the watch display is correct as far as steps/hr/calories goes, but for some reason when everything syncs to GC it all goes wonky.

    I'm having the TZ change issue, that's changing sleep data as well :/ from a couple of weeks of watching all this go down, it seems like there's just an issue of the data on the watch being correct, but when it syncs GC does some wonky crap with it.

    So far I've just been going day-by-day with what the watch is telling me and having to ignore the historical data on GC.
  • Interestingly, all of the "holes" in my heart rate data over the weekend are now filled (they expanded out the last HR measurement, so they are not correct) and Garmin Connect no longer shows the time zone message on those days.

    I really wish Garmin had a developers blog or something to keep us informed when they are dinking around.
  • Former Member
    0 Former Member over 9 years ago
    One of the days(saturday) my bmr was incorrect is now fixed.

    Friday I had powered off the watch for 2hrs before midnight and it's still showing low. Maybe powering off stops counting bmr?
  • Former Member
    0 Former Member over 9 years ago
    Yep i use MFP and GC unfortunately screws everything up. I'll often get an extra 500+ active calories in a day walking a standard 7500 steps, on top of the 1950 resting (but should be ~1600 based on my stats!), that then transfer over to MFP and give me targets there that i just don't believe.


    Little over two months later, this problem popped up for me last Sunday. At first I thought it might have something to do with summer time and a bug, bug summer time was the week before and passed without issue.

    Like many of you, I've found that my BMR as estimated by Garmin Connect has significantly changed. In my case it dropped from the 1900s into the 1600s; a big change! And like Darren I was using GC to pipe any caloric "allowances" into MFP, which is now messed up and tells me I'm going "over budget" every single day.

    I may know I'm doing just fine, but it'd be great if the numbers actually add up as well! I sincerely hope Garmin will fix the BMR calculations soon!
  • Former Member
    0 Former Member over 9 years ago
    Little over two months later, this problem popped up for me last Sunday. At first I thought it might have something to do with summer time and a bug, bug summer time was the week before and passed without issue.

    Like many of you, I've found that my BMR as estimated by Garmin Connect has significantly changed. In my case it dropped from the 1900s into the 1600s; a big change! And like Darren I was using GC to pipe any caloric "allowances" into MFP, which is now messed up and tells me I'm going "over budget" every single day.

    I may know I'm doing just fine, but it'd be great if the numbers actually add up as well! I sincerely hope Garmin will fix the BMR calculations soon!


    Did you recently update your devices firmware? what device? I am F3 running 6.92b and updated on Sunday. Which was also same day as connect issues so not sure if its a beta issue or connect....

    Since Sunday I'm seeing my BMR lower that what its been on connect for months...its only calculating my base BMR and no longer including the 1.2 multiplier. So its dropped it by 350 calories.

    I've worked around this in MFP by changing my height/age to match garmin's BMR value and then just set a custom daily calorie goal in MFP. But for people who rely on MFP to set their goals etc this isn't an option.

    But Garmin needs to say what's going on....it will cause a lot of confusion for folks as the "garmin connect calorie adjustment" will be way off with this change.