help menu

Join us on the Community Forums!

  • Community Guidelines

    The Fitbit Community is a gathering place for real people who wish to exchange ideas, solutions, tips, techniques, and insight about the Fitbit products and services they love. By joining our Community, you agree to uphold these guidelines, so please take a moment to look them over.

  • Learn the Basics

    Check out our Frequently Asked Questions page for information on Community features, and tips to make the most of your time here.

  • Join the Community!

    Join an existing conversation, or start a new thread to ask your question. Creating your account is completely free, and takes about a minute.

Not finding your answer on the Community Forums?

Cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Show  only  | Search instead for 
Did you mean: 

Sudden drop in cardio fitness score - glitch?

Replies are disabled for this topic. Start a new one or visit our Help Center.

‎08-21-2019 05:05 - last edited on ‎11-17-2020 10:43 by Fitbit Moderator

‎08-21-2019 05:05 - last edited on ‎11-17-2020 10:43 by Fitbit Moderator

Hello, 

I’ve had a FitBit for 3 years and have always had a cardio score of around 42.

Suddenly, overnight this has changed to 26?! 

 

33 years old, female, 135lb, very active, gym 2-3 times per week and have a job which sees me average 20,000 steps per day. 

Due to an erratic work schedule I don’t always get enough sleep so my resting heart rate varies from 58 to 67 (higher when I’ve not slept long enough). Currently it’s 60.

 

I’ve contacted customer support to see if this is a glitch but I’ve just been sent a generic response about how their systems calculate the scores and what they’re useful for while exercises. 

 

I’m just incredible doubtful that I’ve gone from near excellent to solidly poor.

Anyone else experienced this? 

Best Answer
Labels:
8 REPLIES 8

‎08-21-2019 05:34

‎08-21-2019 05:34

You aren't the only one who has seen a significant drop in fitness. I went from the mid 40's to the mid 30's.

Best Answer

‎08-23-2019 13:00

‎08-23-2019 13:00

I’ve seen the same thing. I noticed that my RHR calculations are higher than what they normally are too - this started around June 1st, which correlates with some Fitbit updates. If I look at the daily heart rate values that go into the RHR, they can be just about identical yet in May it would give me an RHR of 64 and now it gives an RHR of 68. The RHR goes into the cardio fitness score. It’s all linked and I think there is definitely something weird going on.   

Best Answer

‎08-30-2019 04:57

In response to Ninjafrog

‎08-30-2019 04:57

I had a drastic decline as well.  Over a two or three week period my score went from excellent, to very good, then good and a few days ago it was average!  There has been no change in my lifestyle other than a birthday.  Does anyone have any idea what might have happened?

Best Answer

‎09-07-2020 05:53

‎09-07-2020 05:53

Did you ever figure this out? I went from years of "Excellent" to suddenly "Poor"!! My RHR is around 54, and I work out 5-7 days a week with long Peak zones. Maybe it's my age (I have recently turned 46) but not sure that is a great reason to suddenly have poor cardio health! Makes me want to stop using Fitbit. Was about to buy another one but this is discouraging.

Best Answer

‎12-15-2020 08:15

‎12-15-2020 08:15

Same thing happened here. My cardio score was between very good and excellent. (43 - 47 I believe it was) After an 8,6 km run today, my cardio score suddenly dropped to 32.. wich is average, almost poor. 

 

I have seen this bug before. Didn't contact support, but deleted my account, and started over again. Now this is happening AGAIN... after a month or so. It makes me worried and it is not motivating at all. 

 

 

 

 

 

Best Answer

‎11-13-2021 05:57

In response to Ashjuh

‎11-13-2021 05:57

Hi there,

I too had an excellent cardio score for women my age up till this week. The only thing that I can think of that changed is that I have been jogging more (Yuck! Not my fave exercise!  😆 ) but not for 10 mins. I usually finish a HIIT workout at home and then finish it off with a 6-7 min jog. 

I am going to restart my watch and app to see if that helps. 

Best Answer

‎09-17-2022 07:31

‎09-17-2022 07:31

This just happened to me as well.  No change in my lifestyle, and my cardio fitness went from 48 to 52, to 29 literally overnight.  This has to be a glitch....right?  Otherwise, I'm at death's door.  😞 

Best Answer

‎07-15-2023 07:00

In response to MeggieMeg

‎07-15-2023 07:00

Same here! From 45 to 30 in a few days. So weird. I do intense cardio 6 days a week and other than dropping a few lbs recently, no other changes. So frustrating!

Best Answer