Case 1:19-cv-11586-FDS Document 343-9 Filed 03/02/22 Page 1 of 5
`Case 1:19-cv-11586-FDS Document 343-9 Filed 03/02/22 Page1of5
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`Case 1:19-cv-11586-FDS Document 343-9 Filed 03/02/22 Page 2 of 5
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`oo Case_1:19-cv-11586-FDSDocument343-9Filed03/02/22Page 2 of 5
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`hittps:/communityfitbit.com5Blaze/Cardio-Fitness-Scoreim-p2066839
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`he Solved: Cardio Fitness Score - Fit
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`C|@ community.fitbit.com/t5/Blaze/Cardio-Fitness-Score/m-p/2066889 * 28 AS:
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`i fitbit.|community Help Dashboard|STORE
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`Cardio Fitness Score
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`06-28-2017 16:07
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`Hil
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`My cardio fitness score, up to today, was 45.6, which is very good for women of my age. Todayafter|
`went for a 4K run it dropped to 40, which is average. | just find this strange as | exercise nearly every day,
`varying between 5K-10K runs and weighttraining in the gym. My resting heart rate generally stays around
`48 or 49.| just don't feel that 40 is very accurate butI'd like to know whyit happened so suddenly.
`Thanks!
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`Answered! Go to the Best Answer.
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`x) O Votes
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`Reply
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`ls
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`adikeenan
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`Jogger
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`1 BEST ANSWER
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`iy
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`bbarrera
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`accurate scores require running with intensity. Fitbit's estimate wasn't the most accurate in a review that|
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`06-29-2017 06:53
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`(Y @adikeenan Start here with Fitbit article on cardio fitness score:
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`hitp://helpfitbit.com/articles/en_US/Help_article/2096/#runs
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`You sound like a well trained athlete, from everything I've read in sports science | would expect your
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`score to be stable. As VO2max is mostly genetic, | wouldn't expect significant +/- 5 point changes unless
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`you've gone from couch potato to athlete in a 3-6 month period (or lost substantial amountof weight).
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`Also, for well trained athletes increases in score require serious VO2max training and even then some
`
`athletes will not see any change in score. These all point to an issue with how the Blaze is estimating your
`VO2max.
`
`I'm a cyclist and didn't try it on my Blaze, because it requires running. However | have seen reports on
`
`Charge 2 forum about the score going downafter an easy run. And Fitbit link above states that more
`
`read at wearable.com (big change in score between review article and VO2max article). Keep in mind this
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`PNA-FB0016668
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`Case 1:19-cv-11586-FDS Document 343-9 Filed 03/02/22 Page 3 of 5
`Case 1:19-cv-11586-FDS Document 343-9 Filed 03/02/22 Page 3of5
`is anew feature, and that data it needs - 10 minute HR and pace on flat ground - is not always the most
`
`accurate on Fitbit devices. So if your Blaze is struggling to detect HR or pace accurately, that could also
`
`impact your score.
`
`Try a Cooper's test to estimate your VO2max for comparison:
`http://www.exrx.net/Calculators/MinuteRun.html
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`and for other waysto estimate:
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`https://en.wikipedia.org/wiki/VO2_max
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`View best answer in original post
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`The last estimation technique in that wikipedia article is Firstbeat. | have used Firstbeat's patented
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`estimation technology on my Garmin bike computer since October, and it took a month ofriding for score
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`to settle from initial estimate of 48 down to 42. My score is stable and not impacted by easyrides, to be
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`expected as that is part of the patented estimation process (detecting and throwing out bad data, and
`
`only using good data to calculate score).
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`Hopethat helps.
`
`Aria, Fitbit MobileTrack on iOS. Previous: Flex, Force, Surge, Blaze
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`6 REPLIES
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`gy
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`bbarrera
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`Veteran Runner
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`@ 2392 ¥ 80 nh 1836
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`06-29-2017 06:53
`
`(Y @adikeenan Start here with Fitbit article on cardio fitness score:
`http://help.fitbit.com/articles/en_US/Help_article/2096/#runs
`
`re
`
`You sound like a well trained athlete, from everything I've read in sports science | would expect your
`
`score to be stable. As VO2max is mostly genetic, | wouldn't expect significant +/- 5 point changes unless
`
`you've gone from couch potato to athlete in a 3-6 month period (or lost substantial amountof weight).
`
`Also, for well trained athletes increases in score require serious VO2max training and even then some
`
`athletes will not see any change in score. These all point to an issue with how the Blaze is estimating your
`VO2max.
`
`I'm a cyclist and didn't try iton my Blaze, because it requires running. However | have seen reports on
`
`Charge 2 forum about the score going down after an easy run. And Fitbit link above states that more
`
`accurate scores require running with intensity. Fitbit's estimate wasn't the most accurate in a review that|
`
`read at wearable.com (big changein score between review article and VO2maxarticle). Keep in mind this
`
`is a new feature, and that cata it needs - 10 minute HR and pace onflat ground - is not always the most
`
`accurate on Fitbit devices. So if your Blaze is struggling to detect HR or pace accurately, that could also
`
`impact your score.
`
`Try a Cooper's test to estimate your VO2max for comparison:
`
`http://www.exrx.net/Calculators/MinuteRun. html
`
`and for other waysto estimate:
`
`https://en.wikipedia.org/wiki/VO2_ max
`
`PNA-FB0016669
`
`

`

`Case 1:19-cv-11586-FDS Document 343-9 Filed 03/02/22 Page 4 of 5
`Case 1:19-cv-11586-FDS Document 343-9 Filed 03/02/22 Page 4of5
`The last estimation technique in that wikipedia article is Firstbeat. | have used Firstbeat's patented
`
`estimation technology on my Garmin bike computer since October, and it took a month ofriding for score
`
`to settle from initial estimate of 48 downto 42. My score is stable and not impacted by easy rides, to be
`
`expected as that is part of the patented estimation process (detecting and throwing out bad data, and
`
`only using good data to calculate score).
`
`Hopethat helps.
`
`Aria, Fitbit MobileTrack on iOS. Previous: Flex, Force, Surge, Blaze
`
`View best answer in original post
`
`le:
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`Q6-29-2017 12:51
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`nee
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`adikeenan
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`Thanksfor your help, I'll be sure to check out other ways of measuring it!
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`Jogger
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`@2v7 060
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`WavyDavey
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`10K Racer
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`i 4148
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`06-29-2017 13:27
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`see
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`If you go on a fast run for 10 minutes, | belleve you'd see an Increase In the score. The lower Intensity of
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`longer runs seems to throwit off.
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`Work out...eat... sleep..repeat!
`Dave | California
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`x) O Votes
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`Reply
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`06-29-2017 18:01
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`mee
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`bbarrera
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`@WavyDavey wrote:
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`Veteran Runner
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`@ 2392 ¥ 80 nf 1836
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`If you go on a fast run for 10 minutes, | believe you'd see an increase in the score. The lower
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`intensity of longer runs seems to throwit off.
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`@WavyDavey Without looking at the data of a long run that decreased a cardio score, myfirst wild guess
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`is that the longer run had enough cardiac drift (rising HR) to artificially skew the score downward. In other
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`words, Fitbit isn't throwing out bad data, it is using all the data (good and bad) to calculate the
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`wrong score. Just a guess.
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`Aria, Fitbit MobileTrack on iOS. Previous: Flex, Force, Surge, Blaze
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`x) 1Vote
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`Reply
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`Case 1:19-cv-11586-FDS Document 343-9 Filed 03/02/22 Page 5 of 5
`Case 1:19-cv-11586-FDS Document 343-9 Filed 03/02/22 Page5of5
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`10-14-2017 21:18
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`nse
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`My cardio fitness score dropped 2 categories in one day, as did mysister's. | woke up in the very good
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`(almost excellent) category and after my evening run | dropped to average. Kind of hard to believe my
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`score Is average when my resting heart rate Is 55. | read the article but It doesn't explain these drastic
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`changes users are seeing.
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`a) O Votes
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`05-19-2020 00:06
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`vee
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`This happened to me today.
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`It dropped from 49 to 47. When i looked at the run details i noticed that the
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`gps had dropped out in the middle of the run soi deleted the run and addedit in manually and my score
`wentback to 49.
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`Versa 2, Charge 2
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`a A
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`udit
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`Jogger
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`ChchChris
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