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Garmin index s2 fat percentage STILL NOT ACCURATE in August 2024

The Index S2 recently bought is way out of mean deviation on body fat. All settings correctly done and actual software.

In itself absurd that a scale like that needs to know activity level to determine fat %. Has got nothing to do when actual determining is done by measuring on stead of calculating the derivation in other words... So in fact the scale does not measure but it only gambles the fat%.

  1. Whats the explanation?
  • Agreed. Even the weight is questionable. The only plus of this device is the integration with the ecosystem.

  • I think that ppl here have unrealistic expectations. If I am not mistaken, this scale (and any similar) just sends small current though your lower body and measures an impedance. The scale tries to gauge your values from this simple result.

    There is obviously no exact way to tell how much bones etc. you have and what percentage does it make in your body.

    Some scales have also additional part to measure impedance through your whole body, but is still the same problem:
    You just take some mean value (average fat,bones etc for man or women of specific age, given some other information Garmin may have) and  apply some logic (calculate a deviation) based on the result of the simple measurement.

    This will never work (for any vendor) 100% well. I can imagine that ppl get especially annoyed, if it measures above expected value than below  ("I am not that fat"). So to increase customer satisfaction, Garmin could just artificaly set it lower :)  It would be still inaccurate, but you would "feel" to be closer to reality.    

    But I think that ppl in general overestimate. Here is one nice example for you to get the reality check
    https://athleanx.com/articles/body-fat-percentage-men

    Imho best use of this scale is to measure a trend and enjoy integration with Garmin ecosystem. If you want to improve it, get DEXA scan and adjust values. The Scale will then asses it better next time.

  • Garmin Index S2 scale is crap. This scale is crap and way too expensive for how poor it is. She really disappointed me because she gives the wrong fat ratio. I just had a DXA and Bod Pod measurement, which is the most accurate there is, and I was measured with a 7% body fat percentage. When I have the Garmin IndexTm S2 Smart Scale measure me, the scale says I have a body fat percentage of 19%, which is twice the correct amount. This scale cannot be said to be useful as it clearly does not work. Returned and received a new one, but it was not a fault in the scale. The scales are simply not able to measure correctly. I'm told this happens most if people have a very low body fat percentage but a relatively good muscle percentage. If it is the case that the scale cannot handle people of that body type, it should be stated in the instructions, or at least the scale should not be sold under the pretense that it is fairly accurate in estimating body mass ratios when it is not at all. I don't know if it can estimate fat mass in people with a lot of fat, and if it does, the scale should be sold under the sign that it can't accurately estimate fat mass in thin people.

  • Garmin Index S2 scale is crap. This scale is crap and way too expensive for how poor it is. She really disappointed me because she gives the wrong fat ratio. I just had a DXA and Bod Pod measurement, which is the most accurate there is, and I was measured with a 7% body fat percentage. When I have the Garmin IndexTm S2 Smart Scale measure me, the scale says I have a body fat percentage of 19%, which is twice the correct amount. This scale cannot be said to be useful as it clearly does not work. Returned and received a new one, but it was not a fault in the scale. The scales are simply not able to measure correctly. I'm told this happens most if people have a very low body fat percentage but a relatively good muscle percentage. If it is the case that the scale cannot handle people of that body type, it should be stated in the instructions, or at least the scale should not be sold under the pretense that it is fairly accurate in estimating body mass ratios when it is not at all. I don't know if it can estimate fat mass in people with a lot of fat, and if it does, the scale should be sold under the sign that it can't accurately estimate fat mass in thin people.

  • There is a long thread in here (latest post in it was two years ago) where people demonstrated that the scale in fact makes no measurements at all to arrive at its body fat numbers, but rather simply uses age- and gender-based correlations. If this is still the case, then what Garmin has been doing is outright fraud: They are selling us a scale that even insists on us not wearing sock and properly placing two feet on the scale, pretending to do some actual measurements, when in fact it does nothing of that sort. This is the stuff of lawsuits, guys...

  • I am confused. Do any of you that any scale you stand on is accurately measuring you bone mass or body fat? This is and has always been snake oil. I think it is funny that anyone thinks this or any scale works accurately. 

  • It's about what the producer communicates on what to expect from the scale. Obviously a scale in that price segment cannot be expected to measure the way more sophisticated and priced scales.

  • Thank you, everyone, for sharing your concerns. Software version's 3.00 and higher introduced a process that allows you to manually input your current Body Composition data for the purpose of calibration. The steps are in the article linked to below. It will take 2-3 measurements after calibrating to see the updated metrics on your scale.

     

    How Do I Set My Body Composition In The Garmin Connect App?

     

     

    Additional articles that address questions in this thread

     

    How Does the Index Smart Scale Series Measure Various Body Data?

     

    Comparing Body Composition Data to Other Tests or Scales

     

    Body Fat Percentage Is Too Low on the Index Smart Scale Series (discusses Athlete Mode)

     

    If you have any further questions or concerns regarding this topic, please contact Garmin Product Support  for the most efficient and detailed assistance.