BMR Test and respiratory coefficient

Ya, if that was the avg at rest RER or incorrectly called RQ (RQ is cellular level, RER is breath level), then that is not good at all.

Should be down around .7 to .72, showing that 95 - 99% of the energy used came from fat while at rest.

But, if you had anything to eat 4 hrs prior it messes that up. Now, perhaps it would be good to examine prior 6 hrs, just in case you digest slowly or settle back to normal after longer time.

Having worked out well the night before can cause problems like that, as well as slightly sick and not breathing right from say congestion.

Hyper-ventilating messes it up, or getting close to that by just breathing in a very non-restful manner, say from nervousness.
Much like the lovely march into exam room at Dr office, jump on table, and take blood-pressure. "gee, it's high, you don't say, I wonder why".

Or the equipment isn't calibrated correctly. Or you had a high oxygen front go through during the test and the assumed O2 content in the air was wrong.

0.99 means 3.2% came from fat, which should be near max exertion.

Thanks for your answer!!!! Hadn't look at this many days ago

I hadn't eat for like 9 hours, neither had excersise, so that shouldn't be the problem....but it is true that I was really nervous so that may have messed with the readings

Already wen't to the doctor, she told me that number meant that instead of burning fat I was practically generating more fat.. She suggested to try to avoid carbs the most I could cause I am no friend of carbs. The problem is when I lower carbs I don't feel ver well, kind of shaky and irritated, eventhough i eat 2000 cals of protein.

With relation to the low RMR, she told to me to start lifting weights, which I already did. Told me that is the only way to increase RMR, and that in 6 months I should be able to increase it around 1400.

The strange thing is she told me to continue esting 1200 calories, which I think is wrong. Do you think increasing my cals will also help to increasemy RMR? Should I start upping 100 calories each week? Was thinking that the low RMR And the high RQ could be related with my body starving... What do you think about this?

Thanks a lot for your help !!!

Nervous would have done it, for sure.

Especially if your body has been trained to be carb burning, not fat burning. That mainly has to do with exercise type. If cardio is always hardest you can go, and you never do any aerobic level cardio, your body is trained to start burning carbs when the HR goes up, or perceived to go up. Same way trained endurance athletes can actually slip into a higher fat burning ratio after starting exercise than others.

So nervous, flight or fight, body prepped by starting to burn what it knew best - carbs.

Now, that may or may not apply, but that has been seen to happen. Do you do much cardio, and at what levels? Lifting is same response, carb burn in prep.

Generating fat, because most of the energy needs was met by carbs? That doesn't even make sense, I'm guessing the Dr was bad at communicating what they were trying to get across on that one.

And I agree, if the body wants to use so many calories for basic functions it wants to do, why not give it that plus more so you actually can improve from the exercise.

Study on group of 60 yr olds showed that with no change of diet, after 6 weeks, with addition of resistance training, added 2.something to their LBM, and lost that much fat, so no weight change. Metabolism went up 7% because of increase of LBM and the exercise.

The RER, if the test is no where around having eaten, is based totally on your body's response to rest, not diet at that point. 4-5 hrs diet effect is over.

Now, if you have some sort of blood sugar problem and insulin was turned on then more carbs would be burned, but after 9 hrs fast, that would be some awful problem you would be noticing all the time.

Nope, I'd chalk it up to nervousness combined with exercise type up till now. So basically invalid data for that.

RMR still just as valid, though is it low genetically or because it's suppressed from under-eating, or from lack of LBM compared to expected amount?
That's what the bodyfat% test will tell you. That RMR could be perfectly reasonable for your LBM. It's just the LBM is very bad for someone your age, weight, height.