is mfp excersice burnt calories calculation accurate?

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martides90
martides90 Posts: 7
in Food and Nutrition
Hi everyone!

Is the calculation accurate? If yes, shall I eat the amount of calories I burnt...only the half?


Thanks.
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Replies

  • yarwell
    yarwell Posts: 10,477 Member
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    very variable in my experience, for example walking up a slope uses more calories than walking along the flat according to my Polar HRM but MFP calls both "walking".

    The MFP calorie numbers don't say whether they include the 1-2 calories per minute that is already accounted for in your BMR and activity level. I subtract this from my HRM calories.

    Eating half back is one approach to compensate for this. If your primary goal is weight loss the whole "eating back" thing may not work for you anyway.
  • acpgee
    acpgee Posts: 7,702 Member
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    I don't trust MFP numbers for exercise. My workout is 65 minutes on the elliptical with a target heart rate of 140. I sprint for 20 seconds if my HR gets too low;

    HRM: 540 cals
    Machine: 780 cals
    MFP: 926 cals

    I trust the HRM.
  • Tubbytucka
    Tubbytucka Posts: 83 Member
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    I enter my exercise time into 4 websites - mfp, strava, garmin and sportstracklive (not that I'm obsessed or anything...) and they give four different amounts of cals burned. I'd take MFP's with a grain of salt, and I suspect that strava (usually the lowest) is more correct.
  • TarshCooper001
    TarshCooper001 Posts: 25 Member
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    No.. a heart rate monitor is the closest you will get to an accurate calorie burn calculation. Invest in one.. it makes a huge difference!
  • nikilis
    nikilis Posts: 2,305 Member
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    on a scale of one to ten...... NO!
  • kimosabe1
    kimosabe1 Posts: 2,467 Member
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    They are incorrect-that is why I only eat half of my exercise calories back.........
  • JacquiMayCrook
    JacquiMayCrook Posts: 308 Member
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    I think it can be used as a guide.

    I tend to only eat back a portion of the calories I earn through exercise (a third to a half, depending on how many treats I feel I can live without.) I know I could be stricter with myself, but it is working slowly but surely, and I don't count any calories I burn in my very manual job, whereas some people count EVERYTHING!:huh:
  • markdavies120
    markdavies120 Posts: 18 Member
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    as been said previously. Only a HRM which includes a Cal counter is going to give you the closest to an accurate figure you can get. Others just consider at a generic best guess. an entry level HRM / Cal counter such as the Polar FT4 is a good starting point without a massive outlay in cost if you are looking to get a pretty accurate read.
  • CarlKRobbo
    CarlKRobbo Posts: 390 Member
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    I hope not, otherwise my Rock climbing really was 2844 Calories Saturday, and my Weekly Kickboxing is 1145 Per session!!

    If that was the case I'd be loosing half a stone a week. I'm not.

    I'd take it down to about a third of what it says at least.
  • LeanneGoingThin
    LeanneGoingThin Posts: 215 Member
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    The MFP calorie numbers don't say whether they include the 1-2 calories per minute that is already accounted for in your BMR and activity level. I subtract this from my HRM calories.

    That's a tricky thing indeed. It's why I stopped eating back my exercise calories.
  • AnguishLanguish
    AnguishLanguish Posts: 149 Member
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    I don't trust MFP calorie burnt calculations, I'm yet to get a HRM so I tend to take off about 10-15minutes from my total time to make it a bit more realistic.
  • falnangel1205
    falnangel1205 Posts: 16
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    The only way to get accurate calories burned is by using a HRM. The cals burned that the machines at the gym, never match what is on the Heart Rate Monitor, and surely what is on here isnt going to be as accurate, as a heart rate monitor is the only thing that can accruately detect your heart rate, continuously...and how fast your Heart is beating is what helps to determine cals that you burn.
  • drefaw
    drefaw Posts: 739
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    I put the specific exercise I'm doing that day into 4 different calculators. Get the average for them, then subtract 25% from that.....And mainly because I weight train, so I only use calcs that are specifically made to figure by muscle group worked and various other data .......


    I have figured out, that even as intense as I keep my weight training every day, I only burn about an avg. of 300 - 360 cals/hr while weight training...MFP will try and give you almost twice that ......
  • glovepuppet
    glovepuppet Posts: 1,710 Member
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    the energy it takes to run a 300 pound body around the track is going to be considerably more than it takes to rin a 100 pound body around the track. no, one standard burn for any set of exercises is not going to be accurate.
  • Joehenny
    Joehenny Posts: 1,222 Member
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    Hell no, not even close lol. I only log exercise out of habit on here and because it helps with routine. Get a hrm.
  • pinkraynedropjacki
    pinkraynedropjacki Posts: 3,027 Member
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    I did a workout yesterday that got me 605 cals burnt via my heart rate monitor..... put the time spent & what it was into MFP & it gave me 1130 burnt for the exact same amount of time.....


    I think I'd halve it. But then I trust my HRM 100%
  • sylo1609
    sylo1609 Posts: 36
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    the energy it takes to run a 300 pound body around the track is going to be considerably more than it takes to rin a 100 pound body around the track. no, one standard burn for any set of exercises is not going to be accurate.

    Which is why MFP adapts the displayed number of burnt calories according to your body weight.
    Still not always accurate though.
  • BoogeyBrat
    BoogeyBrat Posts: 212 Member
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    Eh, I don't take it as gospel. I kind of just use it as an idea of what I may have burned. Besides, I'm not clocking my 'brisk walk' to make sure I'm actually doing 3.5 miles an hour steadily. I'm not a robot. I walk pretty fast pretty consistently, but I also slow down to go around stuff that might be in my way, speed up even faster if I'm in a hurry and I might stop all together for a couple seconds if I drop something or stumble. For the just the unpredictability factor involved I don't think it could truly be exactly 200 calories burnt each 40 minute walk for me.
  • LilMissDB
    LilMissDB Posts: 133
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    There is no realistic way to accurately measure calories burnt. I personally would just use MFP and then eat as many of them as I decided to eat and adjust based on my results.
  • glovepuppet
    glovepuppet Posts: 1,710 Member
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    the energy it takes to run a 300 pound body around the track is going to be considerably more than it takes to rin a 100 pound body around the track. no, one standard burn for any set of exercises is not going to be accurate.

    Which is why MFP adapts the displayed number of burnt calories according to your body weight.
    Still not always accurate though.
    i just put my weight up to 300 pounds, well over double my weight, and it showed the same 69 cals for a 6 minute run as it did before. so, unless there's a time delay on mfp adjusting to new weight (which doesn't seem likely, as my cals went up straight away) then that seems unlikely.

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