logging calories burned....

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How do you REALLY know how many calories you've burned exercising? The machines at the gym and MFP usually say different things. I tend to log the lesser of the two numbers. Any thoughts?

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  • UponThisRock
    UponThisRock Posts: 4,522 Member
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    There's no way to know for sure, everything is an estimate.

    Which is why I think estimating calories and "eating them back" is a little silly. I'm a fan of keeping daily calories consistent, and keeping weekly calories consistent. If progress stops, eat a little less and/or move a little more.
  • therealangd
    therealangd Posts: 1,861 Member
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    You can use a heart rate monitor for a more accurate estimate. But I do the same thing, go with the lesser number. I also may check several websites to get a better sense of what might be more accurate.
  • cfergy
    cfergy Posts: 67 Member
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    yeah, I'm not usually into eating back my calories either. I can't see wasting that effort for something to cancel it out. If I haul my booty to the gym, it's gonna count, that's for sure.
  • LorinaLynn
    LorinaLynn Posts: 13,247 Member
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    Even a heart rate monitor is an estimate. For me, MFP, machines and sites like RunKeeper give similar numbers, so I got by what has the most precise information. They all have my age and weight. The machine at the gym will know my time, pace and incline/resistance, so I'd take that over MFP, and Runkeeper has my pace and incline if I map my route, so I trust that to be fairly accurate, too. But really, they're all within maybe 10-20 calories of each other anyway, so I don't sweat it much.

    Today, I ran 3.66 miles at 6.5mph in just under 34 minutes. Runkeeper calculated 348 calories. Using MFP, running 6 mph for 37 minutes (which would be about the same distance) gives 35, and running 6.7 mph for 33 minutes (equals same distance) is 344 calories. All very close.