MFP calorie burns from strength training way too low?

Hornsby

is your heart rate not intrinsically linked with intensity though?
when i do weights,my heart rate goes through the roof,same as when i do high intensity cardio,
i get that you can't measure the number of colories burnt during the repair process of muscles,
but to me my hrm gives me a calories burnt reading that i beleive to be accurate,
if i feel i have been training at maximum intensity it is usually bourne out by what my hrm says, i. e been working in the top 70-80% of my heart rate. i have 2 hrm's that allows me to input my vo2 max,age sex height weight etc, and one of them guides me when to begin my next set. and is designed for strength training, and my results are right in the ball park of where i'm supposed to be.

What HRM do you have that does that (designed for strength training)? I'm interested.

You said all that stuff about HR. I never said that an HRM doesn't monitory heart rate during strength training, but HR and calorie burn aren't the same thing.

ETA: http://www.myfitnesspal.com/topics/show/1044313-this-is-why-hrms-have-limited-use-for-tracking-calories?hl=why+HRM

fozzie500

is your heart rate not intrinsically linked with intensity though?
when i do weights,my heart rate goes through the roof,same as when i do high intensity cardio,
i get that you can't measure the number of colories burnt during the repair process of muscles,
but to me my hrm gives me a calories burnt reading that i beleive to be accurate,
if i feel i have been training at maximum intensity it is usually bourne out by what my hrm says, i. e been working in the top 70-80% of my heart rate. i have 2 hrm's that allows me to input my vo2 max,age sex height weight etc, and one of them guides me when to begin my next set. and is designed for strength training, and my results are right in the ball park of where i'm supposed to be.

What HRM do you have that does that (designed for strength training)? I'm interested.

You said all that stuff about HR. I never said that an HRM doesn't monitory heart rate during strength training, but HR and calorie burn aren't the same thing.

i have a polar ft80 (strength training) and a polar rc3 gps,

i know hr and calorie burn are not the same thing,
but it is my understanding that the calculations for calorie burn are based on what your heart is doing during the exercise period.

Hornsby

is your heart rate not intrinsically linked with intensity though?
when i do weights,my heart rate goes through the roof,same as when i do high intensity cardio,
i get that you can't measure the number of colories burnt during the repair process of muscles,
but to me my hrm gives me a calories burnt reading that i beleive to be accurate,
if i feel i have been training at maximum intensity it is usually bourne out by what my hrm says, i. e been working in the top 70-80% of my heart rate. i have 2 hrm's that allows me to input my vo2 max,age sex height weight etc, and one of them guides me when to begin my next set. and is designed for strength training, and my results are right in the ball park of where i'm supposed to be.

What HRM do you have that does that (designed for strength training)? I'm interested.

You said all that stuff about HR. I never said that an HRM doesn't monitory heart rate during strength training, but HR and calorie burn aren't the same thing.

i have a polar ft80 (strength training) and a polar rc3 gps,

i know hr and calorie burn are not the same thing,
but it is my understanding that the calculations for calorie burn are based on what your heart is doing during the exercise period.

Right, and hence, that's why it isn't necessarily accurate because heart rate elevation does not equal calorie burn. I added a link to my last post. Have a read.

LuisB3

Agreed!!!

heybales

is your heart rate not intrinsically linked with intensity though?
when i do weights,my heart rate goes through the roof,same as when i do high intensity cardio,
i get that you can't measure the number of colories burnt during the repair process of muscles,
but to me my hrm gives me a calories burnt reading that i beleive to be accurate,
if i feel i have been training at maximum intensity it is usually bourne out by what my hrm says, i. e been working in the top 70-80% of my heart rate. i have 2 hrm's that allows me to input my vo2 max,age sex height weight etc, and one of them guides me when to begin my next set. and is designed for strength training, and my results are right in the ball park of where i'm supposed to be.

No.

You ever had your HR race because of too much caffeine or other meds?

It'll will also start elevating in exercise because of getting dehydrated, thicker blood, less oxygen, need to pump more. Intensity stays the same or goes down.

It will also elevate in the summer to assist with cooling, pushing more blood to surface to help with that.

None of that is related to intensity, or at least not a change in intensity or effort that you would think a rising HR would indicate.

Your HR raises from lifting NOT because of any need for more oxygen at all. Unless you hold your breath the whole time.

You can believe what you want, but VO2max has nothing to do with anaerobic effort, except where that effort starts.
VO2max is your bodies ability to supply oxygen as required for effort, doesn't apply when it's anaerobic.

It thinks that elevated HR was reached with cardio and hence calorie burn appropriate to that level.
You reach the same average HR in a cardio session, you'll get the same calorie burn.

They FAQ on that strength training watch used to include a comment regarding calories not being the purpose, merely watching for when it's time to move on.

Double encouragement to read the topic that was posted too, it is excellent, showing the disconnect between VO2 and lifting.

fozzie500

yeah i've read all that guys posts about how innacurate the calorie burn is,but on the web most of the research (admitedly there's not loads) points to an innacuracy average of about 25% - 15% which to me doesn't seem bad, dependent on model of hrm and sex of person wearing it., is this not acceptable to us amateur athletes?
do we really think we are dealing with an exact science regards losing weight,building strength,so why should we expect the calorie burn on these devices to be exact?
not trying to be argumentative, it's just these threads always end up with someone saying get a hrm and then someone else shooting hrm's down in flames.personally my hrm is a great motivational tool,it may just be saving me the bother of writing all my exercise down, but to me it's not.

fozzie500

is your heart rate not intrinsically linked with intensity though?
when i do weights,my heart rate goes through the roof,same as when i do high intensity cardio,
i get that you can't measure the number of colories burnt during the repair process of muscles,
but to me my hrm gives me a calories burnt reading that i beleive to be accurate,
if i feel i have been training at maximum intensity it is usually bourne out by what my hrm says, i. e been working in the top 70-80% of my heart rate. i have 2 hrm's that allows me to input my vo2 max,age sex height weight etc, and one of them guides me when to begin my next set. and is designed for strength training, and my results are right in the ball park of where i'm supposed to be.
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No.

You ever had your HR race because of too much caffeine or other meds?

It'll will also start elevating in exercise because of getting dehydrated, thicker blood, less oxygen, need to pump more. Intensity stays the same or goes down.

It will also elevate in the summer to assist with cooling, pushing more blood to surface to help with that.

None of that is related to intensity, or at least not a change in intensity or effort that you would think a rising HR would indicate.

Your HR raises from lifting NOT because of any need for more oxygen at all. Unless you hold your breath the whole time.

You can believe what you want, but VO2max has nothing to do with anaerobic effort, except where that effort starts.
VO2max is your bodies ability to supply oxygen as required for effort, doesn't apply when it's anaerobic.

It thinks that elevated HR was reached with cardio and hence calorie burn appropriate to that level.
You reach the same average HR in a cardio session, you'll get the same calorie burn.

They FAQ on that strength training watch used to include a comment regarding calories not being the purpose, merely watching for when it's time to move on.

Double encouragement to read the topic that was posted too, it is excellent, showing the disconnect between VO2 and lifting.

sorry no, ive never had my heart rate get to 179bpm due to caffine or meds.

Hornsby

Okay, so you know they aren't accurate, and now it's about others telling people they aren't accurate?

I don't care either way who uses one. But if someone comes in and says MFP calculations are too low, and someone replies with "get an HRM to be sure", of course I am going to say they aren't accurate. People don't need to waste their money if that's all they want an HRM for.

I don't expect an HRM to be exact, but using it for something that it isn't designed to do and then calling the results accurate isn't very bright.

fozzie500

no, it's not that at all,i'm just providing anecdotal evidence that using a hrm can help to get a handel on how many calories are burnt, but now i'm just wondering how i'm losing weight, reshaping my body when i use weights as well as other stuff,and all my info on calories burned comes from my hrm. it's late, no offence was meant to anyone, and all this fitness stuff,well it's a learning curve for everyone,me included.

Hornsby

i'm just wondering how i'm losing weight, reshaping my body when i use weights as well as other stuff,and all my info on calories burned comes from my hrm.

It's the internet, no offense was taken, and none was intended towards you either.

How are you losing weight? You are creating a calorie deficit.

geebusuk

is your heart rate not intrinsically linked with intensity though?

Calorie burn is ALSO intrinsically linked with movement.

You can watch a scary film while doing weights and have your heart rate peak higher.

yeah i've read all that guys posts about how innacurate the calorie burn is,but on the web most of the research (admitedly there's not loads) points to an innacuracy average of about 25% - 15% which to me doesn't seem bad, dependent on model of hrm and sex of person wearing it., is this not acceptable to us amateur athletes?

Was that related to weights? If so, do you have it to hand?
More likely, it seems it would be related to cardio activities, where it can be reasonably accurate.

From what I've seen the algorithms for cardio work are fairly good, even more so if the GPS device links to topo data or other ways to know the elevation you are going up/down.

I haven't seen that anyone's made decent algorithms for weight lifting.

Also, what deficit do you average by your calculations and what rate of loss do you get?

ksuh999

I got around 300 cals burned on my HRM when I did SL. This was later on when I was lifting heavier. I never thought it was unreasonable. For a younger person I can definitely see that number being higher (I'm 40).

geebusuk

Incidentally, on another thread I worked out the calories burnt doing the actual movements for me doing a starting strength routine.
I think it came to around 50 from actually moving - using weight lifted multiplied by height and then inefficiency factors.

Chonzo68

I don't use the "strength training"tab ..I use the "circuit training" tab under cardiovascular..I do an intense workout with heavy weights and lil rest times..I superset everything..MFP is not accurate on a lot of things..It just gives the bare minimums.. I've learned to make my own adjustments...

DopeItUp

I find myself so hungry after weight training it can't possibly be only a 150 calorie burn in an hour.

Yeah, and it must be more like 300 in my case instead of 200.

I think I'm on the right track...after the extra hundred calories yesterday, I feel like I am more recovered this evening, 24 hours later, than I felt this morning.

Anyone else?

I actually found it to be pretty good for me. It would give me 450 calories for a 90 calorie session and it was pretty much dead on.

A lot depends on the intensity of your workout and MFP can't possibly know that. Some people have minimal rest between sets (like 30-90 seconds). Some people like me have more. A lot more. On my top set I take at least 10 minutes of rest, sometimes up to 20 before I attempt it. Between sets of chin-ups? 5 minutes rest. The list goes on.

Nevermind the amounts of weight lifted multiplied by reps are going to affect your burn too, and MFP doesn't know that either. So I guess it shouldn't be surprising that results may vary.

jofjltncb6

General consensus on the boards is that heart rate monitors do a poor job at guesstimating calorie burn on weight training, compared to the steady-state aerobic activity for which they're generally better suited. Weight training doesn't, typically, burn a whole lot of calories.

That said, if you're on a bulk to begin with, increasing your surplus by a bit if you're not seeing the gains you expected may be appropriate.

Not just on the boards, but (many of) the HRM manufacturers themselves admit it.

geebusuk

. On my top set I take at least 10 minutes of rest, sometimes up to 20 before I attempt it. Between sets of chin-ups? 5 minutes rest. The list goes on.

And this is another issue with it. I go for five minute rest if I've got time, or go down the weight very slightly and two minute rest if I'm busy.

Likely that my heart rate will still be elevated over rest for those five minutes, so a HRM would be noting me as doing *some* work for five minutes, when the most is often fiddling on a computer or playing with the dog on the sofa.

Fithealthyforlife

Wow, so many great replies!

Clearly, I was vastly underestimating my Stronglifts burns. I do feel localized glycogen depletion in my arms and shoulders after a session. At least that's what I assume it is. It's like a dull, mild burn. Not intense like the lactic acid burn you get after running.

So, even though I have my MFP set to active, I was apparently shrinking my surplus down to the 200-300 cal level by underestimating the burns.

I am upping my lift-day calories by another hundred or so starting now. That will make for an increase of 200 cal in the past week on workout days. In addition, I recently upped my baseline surplus everyday to 500 from 400 (as of several weeks ago when I started Stronglifts). I'm eating 3060 cal on non-workout days (and eating back any other estimated burns in addition), and will be eating 3460 or so on Stronglifts days like today (again assuming no other huge activity for the day).

Thanks again!

waldo56

Incidentally, on another thread I worked out the calories burnt doing the actual movements for me doing a starting strength routine.
I think it came to around 50 from actually moving - using weight lifted multiplied by height and then inefficiency factors.

Did you account for the inefficiency of ATP production for an anaerobic vs. aerobic reaction.

50 cals of aerobic fuel burn is 800 cals of anaerobic fuel burn for an equal amount of ATP.

sloane70

Plugged in a theoretical 30 min weight session at "difficult" intensity into my UP band interface (for the stats, I'm 186 lbs at 5'5" 44 yo female). UP says that it equals a 394 calorie burn. Just figured I'd toss that number out there. MFP equates that to just under 100 calories, IIRC.