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BMR calories

Former Member over 9 years ago

Today I noticed that for some reason Garmin Connect gave me a BMR of 1978 calories on 3/31/16. Every other day I have a BMR of 2353 (if I lose/gain weight that changes a tiny bit of course but basically 2353 every single day). Now all the sudden in my reports I see one day, last Thursday, with a 1978 BMR? What's up with that?

Has anyone had this kind of weird thing happen? I'm wondering if its somehow related to what I mentioned in another thread where the calories and activities are reported "all over the place" in GC when you do activities that cross midnight boundary (i.e. you get activities listed for X day but most of the calories from the activity are actually given to the following day - b/c maybe most of the activity was done just after midnight but you started the activity before midnight so it still reports you did the activity the prior day but gives you most of the calories for the following day). You can see that thread here: Active calories issue.

0 Former Member over 9 years ago

Since the weekend mine are low as well. Today is the 3rd day I am projecting 1750 calories for bmr instead of 2100.

They appear to have removed the 1.2 multiplier on bmr calories but that now messes up mfp adjustments even more.

They were using st Jeor bmr formula x 1.2 to get bmr calories. Now they look to be using only st jeor bmr formula.

Myfitnesspal uses St jeor bmr x 1.25 as a sedentary bmr so things are being calculated a lot lower by garmin and will mess up calorie adjustments going over to mfp.

Wish they'd give us an explanation.

0 Former Member over 9 years ago

According to an email from product support there was a system issue on the particular day I noticed the issue above. They say that's what caused the resting calories to be reported so low.

However I have noticed it happened again on April 12th. This time my FR630 decided to log 2047 resting calories for that day. That now makes 2 instances where resting calories are way off from the norm. The first time it was Mar 31 and gave 1978 resting cals when my daily resting calories each day, at that particular weight, were 2353. Then on April 12 it reported 2047 when my daily resting calories are now usually 2340.

I have replied to Garmin again about this to ask if it was yet another system issue. I'll update once I get a reply.

0 Former Member over 9 years ago

Garmin changed the formula

I had made a support call too and Garmin indicate that they have actively changed the BMR-calculation. To quote their support personnel (translation below):

Het is door ons hoofdkantoor onderzocht en dit is een bewuste verandering geweest. De formule voor de BMR berekening gaf een te hoge waarde en is daarom naar beneden bijgesteld naar een realistischer waarde. Ik heb doorgegeven dat dit helderder door gegeven had kunnen worden. Onze excuses voor enige verwarring.

In english:

Our main office investigated the matter and this was a conscious change. The formula for the BMR calculation gave too high a value and was adjusted to give a lower and more realistic value. I conferred to them the message that this could have been communicated more clearly. Our apologies for any possible confusion.

Basically to sum it up: Garmin Connect used to apply the same x1.2 multiplication factor on top of your BMR as apps like MyFitnessPal do. They axed the x1.2