Calories Burned: Machine Vs HR Monitor

  • Posted by a hidden member.
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    Jun 06, 2012 3:36 AM GMT
    I ran a geeky experiment while at the gym. I know there's some debate regard the accuracy of the number of calories burned cardio machines report. I, for the most part, assumed it uses a general formula of some sort, but found some interesting observations.

    The equipment used was a spin bike. No age, or weight entered and it did not have to capability to be paired with a HR monitor. Just hit the manual setting and spun for 60 minutes. I was also wearing my Garmin heart rate monitor (which had my weight, age programmed into it) and was constantly watching the number of calories burned on both systems.

    What I found was that the number the spin bike was telling me was pretty accurate to what my heart rate monitor was reporting, with about a 20 calorie difference. However, it was only accurate for about the first 30 minutes. Beyond 30 minutes, the gap started to increase at a pretty high rate. After the 60 minute period the number of calories was off by almost 200.

    This is by no mean scientific and probably differs by machine, but though it was interesting. Just thought I'd share.
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    Jun 06, 2012 12:39 PM GMT
    Okay, in which direction was the count off? Were you burning more calories according to your heart monitor or the bike?
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    Jun 06, 2012 5:51 PM GMT
    medfordguy saidOkay, in which direction was the count off? Were you burning more calories according to your heart monitor or the bike?

    Wondering the same. Need to know which to use to make me feel better! icon_lol.gif
  • dalwriter

    Posts: 167

    Jun 06, 2012 5:58 PM GMT
    I also see large discrepancies between what gym equipment and what my heart rate monitor report. The HRM is always way higher. I tend to go with its reading because it has my personal data as the OP mentioned, but also because it makes me feel better about myself icon_redface.gif

    I'd love to find a good source on HRM accuracy vs. machines.
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    Jun 06, 2012 6:30 PM GMT
    ^^
    That's what I was thinking.
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    Jun 06, 2012 7:59 PM GMT
    Yes, the HR Monitor read higher. I trust it more as it knows my weight, age, and how hard I'm working via heart rate.
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    Jun 07, 2012 4:21 PM GMT
    http://goaskalice.columbia.edu/are-exercise-equipment-calculations-reliable

    http://www.livestrong.com/article/268271-how-accurate-are-the-calories-burned-on-exercise-equipment/

    http://www.livestrong.com/article/514460-how-to-interpret-calories-on-an-exercise-machine/