Heart Rate Monitor and RMR

Koshkaboo

Is there a heart rate monitor or app for a heart rate monitor that will let you custom set your RMR and which will use that instead of whatever RMR formula the app uses?

I have had my RMR actually tested and it is very low - 1125.

I have a Fitbit and I know Fitbit uses the Mifflin-St. Jeor equation to determine RMR. WIth that I was able to go in and tweak my height (made myself 6 inches shorter) to come up with an RMR that matches my actual RMR. Fine. That works.

However, I also use a chest strap heart rate monitor (Polar H7) for some activities that are not well recorded by the Fitbit. Currently I use the app iCardio (by fitdigits, used to be digifit) to record my chest strap workouts since that app talks to Fitbit.

I was getting astronomically higher calorie burns using the chest strap rather than Fitbit. Part of that, of course, is that the chest strap better records my actual heart rate during exercise.

But, I think part of it is that iCardio is using age, gender and weight to determine calorie burn. This post explains how iCardio (Fitdigits) determines calorie burn using heart rate:

http://blog.fitdigits.com/tips-and-how-tos/counting-calories-fitdigits/

For women - the formula used is:

Women: C/min = (-59.3954 + (0.274 x age + 0.103 x weight + 0.380 x VO2max + 0.450 x HR)) / 4.184

They determine VO2max based upon age and self-reported fitness level. However, you can go in and change the VO2 max manually if you know it.

They also give you a BMR. It gives mine as 1299 which is consistent with the Harris Benedict equation.

There is no way to change it.

The primary reason my RMR is so low compared to the equation is because I have high body fat even though I am normal weight (skinny fat).

I want to get the best calorie burn info as I can from my heart rate monitor. The formula iCardio uses is fairly standard but uses age. A better formula uses lean body mass (Katch McArdle for example) but most people don't know that. So I understand why many in effect use gender and age as a proxy for lean body mass. And that works fine for people whose LBM is consistent with their weight. Mine isn't.

Ideally I would like to find an app that would work with my Polar H7 where I could manually put in my actual tested RMR and calorie burn would use that.

Next ideal - if there is nothing that works with the Polar H7) to do that would be to buy a HRM where I could put in the actual RMR and use that to determine calorie burn.

Does anyone know of either of these.

Third option is basically to back into getting calorie burn similar to Fitbit (at the same heart rate) by tweaking the VO2Max number in my iCardio app. That is, I am currently happy with how Fitbit determines my caloriers burned since I tweaked my RMR there by changing height. But, sometimes Fitbit doesn't get my heart rate right. I can figure out what VO2Max works out to my Fitbit calorie burn and then tell iCardio that is my VO2 max and I think it will be OKish.

Still I would prefer to have an app where I could just put in my actual tested RMR.