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Index S2 Body Fat% algorithm & age. Test

AlbertoGaMo
over 3 years ago

I have just tested Index S2 changing only my age. I have compared it with a Tanita and a Withings scales.

Me. 48 years Triathlete not pro. Right now off-season, finishing the recovery process after an injury.

Height 1.90m

Precompetition  BF%7-%9. 

Today weight Tanita RD545: 78.6kg BF% 11.9% BW% 63.5 Bone Mass: 3.4Kg

Withings Body Cardio+: 78.6kg BF:12.0% BW% 63.3

Index S2:

1st test: Age 48 (Real) 78.7Kg BF% 15.7 BW% 61.6 Bone Mass:4.9Kg

2nd test (2min later) Age 28  78.7 Kg BF% 13.5 BW% 63.2 Bone Mass 5.8Kg

3rd test (1 min later) Age 22   78.6 Kg BF% 12.6 BW% 63.8 Bone Mass 6Kg

4th test (1 min later) Age 20  78.6Kg BF% 12.6% BW% 63.8 Bone Mass 6.1 Kg

After the test, I seems clear the algorithm depends on Age and not only that the Body water and body Mass change too.

Please Garmin could you tell me how is this possible?

  • 0 over 3 years ago

    It doesn't seem to me too difficult to do that change in algorithm. Anyway the real question is if Garmin scale sensors measure anything or the scale gives only an estimation based on general population averages. Garmin has a big data collection of our health and fitness data to produce accurate results but as I can assume the fitness age or VO2max could be estimations, the weight and body fat%(via impedance) is a real measurable data.

  • 0 over 3 years ago in reply to RoWe

    Results should not be calculated. This product is advertised as scale that measures not a device that makes makes a rough guess of your body composition. Garmin need to read their own website which says "Accuracy matters when it comes to your goals".

    Basically this product is not fit for purpose.