Yes the Fitbit charge HR is accurate

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  • BradandLibby
    BradandLibby Posts: 14 Member
    Yesterday I made the same spreadsheet too, using 13 weeks of data. I'm fascinated by the data, and so far it did prove that my food logging and Fitbit calories used are fairly accurate. My actual weight loss was about the same as my "should be" weight loss. But right now I'm set to lose at 1.5 pounds per week, or a deficit of 5.250 calories per week; so there's potential for a pretty big range of error. It will be interesting to see how accurate my logging/Fitbit will be when the deficit is much smaller. But for now the math is working out, and that makes my numbers heart happy.
  • Sued0nim
    Sued0nim Posts: 17,456 Member
    Bshmerlie wrote: »
    Hornsby wrote: »
    I would assume the accuracy would rely heavily on the types of activities/exercises the user is doing, no?
    Possibly. I'm walking on a treadmill.

    So it's using the pedometer over the HRM ...makes sense

    My fitbit zip is accurate too ...over rolling 6-8 weeks checks over the last year I have lost / maintained generally as expected

    It's the HRM function of fitbits (and other watches) that I am dubious of ...as in yet to be convinced
  • shadow2soul
    shadow2soul Posts: 7,692 Member
    I have the Surge and so far it's come out really close (considering some inaccurate logging on my part).
    Since March 1st:

    Total weight lost- 23.4 lbs
    Expected Loss - 24.7 lbs
    Average Total Burn according to Surge- 2534.15
    Estimated Actual Average Burn - 2460.34
    total burn: 410533
    total intake:324038

    Now I have recently tightened up my logging a bit and the results so far with increased logging accuracy on my part:

    Total weight lost from 7/2 to 8/9 - 5.3 lbs
    Expected Loss - 4.5 lbs
    Average Total Burn according to Surge- 2588.69
    Estimated Actual Average Burn - 2655.69
    total burn:100959
    total intake:85022

    I let my Surge pick up everything. I even go under Exercise mode and select weights on my lifting days. While I have tightened up my logging, I'm still not perfect and given that fact I'd say the Surge has been fairly accurate for me.

    As for tightening my logging, on July 2nd I started logging the crystal light I drink and my diet MTN Dew (guess at calories based on the fact that a 24 oz bottle is around 10 calories, but a can is labeled as 0). Just a couple days ago, I also started logging my sweetener packets. I still go out to eat from time to time though at places that don't have calorie information available and as a result I'm still not perfect with the logging.
  • 6502programmer
    6502programmer Posts: 515 Member
    editorgrrl wrote: »
    The only way to gauge the accuracy of any device is to trust it for several weeks, then reevaluate your progress. I was shocked how many calories Fitbit said I could eat. But I lost the weight—and kept it off.

    Yep, this is my experience too. Between MFP logging, Fitbit reporting, Withings weighing, Trendweight analyzing, and waistband shrinking, all data points agree with each other fairly conclusively, for me.
  • rosebette
    rosebette Posts: 1,660 Member
    I think the fitbit itself is probably fairly accurate, since I try to eat below whatever it says and am maintaining. The way it syncs with MFP is weird. For instance, I did a 45 minute strength/aerobic combo, plus an hour on the treadmill. MFP gave me 244 calories, but by lunchtime had taken them all away, then put them back.
  • editorgrrl
    editorgrrl Posts: 7,060 Member
    rosebette wrote: »
    I did a 45 minute strength/aerobic combo, plus an hour on the treadmill. MFP gave me 244 calories, but by lunchtime had taken them all away, then put them back.

    MFP recalculates your adjustment every time you sync your tracker with Fitbit. You can click on the adjustment in your diary to see the math MFP used to calculate it—and the time.

    My adjustments were wonky at first, but they got better—as if MFP was "learning" my routine. Also, I log exercise in Fitbit—never MFP. It'll take trial & error to find what works for you.
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