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stclaus0
1 month ago

Garmin you ruined my last few weeks LOL

my stress calculation was high . sometimes too high ! i just got another 955 to compare values. and the offset is +20 ~ +50 . and yes it is verified. my 955 is counting it wrong. 

and i got vo2max drop + unproductive status too.

i thought i was ill or overtrained as he.ll - but i am not haha 

i was pretty scared about my condition. but it is f955's fault OMG !

please can anyone tell me how i can perform full factory reset ? i am not sure which option i should use. 

or is it possible to downgrade sw ? if so, how ?

thanks for help.

Have a nice day !

  • 0 1 month ago

     

    not best photo but you can see the difference @stress

  • 0 29 days ago

    How is the HRV reporting between the units?

  • 0 29 days ago

    hello and thank you for you interest. 

    what i found out.

    hrv seems ok.

    stress calculation is the problem - it randomly shoots up to high (sometimes very high) numbers for random duration - with no evident reason. mainly during the day. during the sleep stress values look normal (below ~20) . maybe there is a minor/few points deviation but no big spikes. so maybe it is somehow connected to heart rate. 

    maybe i am wrong but i think that other calculations are derived from stress variable. so these numbers are wrong too (body battery, sleep score, training status, performance condition, recovery time, vo2max)

    i am not 100% sure but i think that first problems started after 20.26 update.

    now i did all possible resets. but there is no change unfortunatelly - still wrong stress data. i hoped that master reset will restore default firmware. but no. it is 20.32.

    i see only 2 reasons:

    it is hapenning because of firmware update. i did not find any way how to downgrade to 19.18 to test it out.

    or the sensor is broken.

  • 0 29 days ago in reply to stclaus0

    Stress is calculated directly from HRV. So if the HRV readings between two watches are identical, they should be accurate (or at least consistent). If you start wearing a Garmin, it takes a while to learn your baseline (HRV at rest) and the HRV value when you experience high stress. Everything between those values then gets a value between 0 and 100.

    Thus, you cannot compare readings from your watch that already knows which ones from another you just try on.

    www.firstbeatanalytics.com/.../

  • 0 29 days ago in reply to 7dfcd1938c0146f1804397d33ddc9c14

    but how can i get hrv? i see only night hrv value. so it is not possible to get realtime hrv . or am i wrong ? 

    >>  If you start wearing a Garmin, it takes a while .>> i wear this watch for almost one year. so this is irrelevant. i had no problem until september 

    >> Thus, you cannot compare readings from your watch that already knows which ones from another you just try on. >> dont agree with this . and i think you are wrong.

    it does not matter what you write. we are 2 persons with 2 identical watches (bought at same time). we can try these watches on 2 hands of 1 body . it does not matter who has the watches. my watch is always showing wrong stress score with offset +20 ~ +50

    hope you can understand what i mean 

  • 0 29 days ago in reply to 7dfcd1938c0146f1804397d33ddc9c14
    7dfcd1938c0146f1804397d33ddc9c14 said:
    Stress is calculated directly from HRV

    i very much doubt it. i checked some of my health snapshots. and there is NO direct correlation between stress and hrv

  • 0 28 days ago in reply to stclaus0

    can we accept this screenshot as proof ? 

    anyway . NO WAY i have stress at 40. i just cant have such a high stress at the moment. it should be around 15. or even less. 

  • 0 28 days ago in reply to 7dfcd1938c0146f1804397d33ddc9c14

    lets wrap it up. i have 2 watches. lets assume we do not know the exact configuration of each. it does not matter after all. 

    because stress value is a number. and there should be an offset between these values of 2 watches used on 1 body. and that offset should be a constant and be solid over time. yes there may be a minor deviation in measurement. 

    with many measurements i found out that offset of these 2 watches for me is between +5 to +60. average offset is +10. so i can say if one watch is showing stress value of 10 another watch should show 20. 

    and the problem is that 90% of time (i spent this evening with measurements) the offset is not +10 . it is more than +25. which means that my watch is wrong by at least  15 stress points. when i have stress 15 it shows 40. and i can exactly see when the value jumps to the wrong numbers. and when it finishes and goes back to normal (right) values . 

    this is my problem. 

    anyway thank you.  you helped me a lot to create correct measurement and conclusion.