![Fitbit study finds heart rate variability fluctuates by age, gender, time of day and activity level | MobiHealthNews Fitbit study finds heart rate variability fluctuates by age, gender, time of day and activity level | MobiHealthNews](https://www.mobihealthnews.com/sites/default/files/Fitbit_Versa_3_Lifestyle_Park_Jog_Pink_Clay_OTS_Connected_GPS_MH_0307.jpeg)
Fitbit study finds heart rate variability fluctuates by age, gender, time of day and activity level | MobiHealthNews
![I got my Covid booster yesterday. Today my Fitbit recognized my heart rate and HRV changed and told me my body is stressed out. Just thought this was cool! I'll be resting I got my Covid booster yesterday. Today my Fitbit recognized my heart rate and HRV changed and told me my body is stressed out. Just thought this was cool! I'll be resting](https://preview.redd.it/5stm0hjzf2e81.jpg?width=640&crop=smart&auto=webp&s=81ab524a187c9c2377fe628f575d133a373e80fc)
I got my Covid booster yesterday. Today my Fitbit recognized my heart rate and HRV changed and told me my body is stressed out. Just thought this was cool! I'll be resting
![What made Heart Rate variability (HRV) drop so low? Or is it something to be concerned about? : r/fitbit What made Heart Rate variability (HRV) drop so low? Or is it something to be concerned about? : r/fitbit](https://preview.redd.it/hgns8s321lq71.jpg?width=640&crop=smart&auto=webp&s=5f75508ce857b32b2b1ea36b6d3b9d5971a6d9b4)
What made Heart Rate variability (HRV) drop so low? Or is it something to be concerned about? : r/fitbit
![Heart rate variability with photoplethysmography in 8 million individuals: a cross-sectional study - The Lancet Digital Health Heart rate variability with photoplethysmography in 8 million individuals: a cross-sectional study - The Lancet Digital Health](https://www.thelancet.com/cms/asset/0d649219-4f2f-4f2c-98b9-1e19ceb29c48/gr1.jpg)
Heart rate variability with photoplethysmography in 8 million individuals: a cross-sectional study - The Lancet Digital Health
![Fitbit Zip (top left), chest strap for heart rate and HRV monitoring... | Download Scientific Diagram Fitbit Zip (top left), chest strap for heart rate and HRV monitoring... | Download Scientific Diagram](https://www.researchgate.net/publication/301390045/figure/fig1/AS:367800951558145@1464701988740/Fitbit-Zip-top-left-chest-strap-for-heart-rate-and-HRV-monitoring-top-right-Sleep.png)
Fitbit Zip (top left), chest strap for heart rate and HRV monitoring... | Download Scientific Diagram
![Fitbit Charge 4 not reading HRV and BR for past two nights. Is anyone else experiencing this? : r/fitbit Fitbit Charge 4 not reading HRV and BR for past two nights. Is anyone else experiencing this? : r/fitbit](https://external-preview.redd.it/LZerJY77eiObgeLfk7AsAdKRmLu-jpdaUkZeaqUevF0.png?width=640&crop=smart&auto=webp&s=6e63a206b2b0ca2ecd35ee8debd978a9fa1569c6)
Fitbit Charge 4 not reading HRV and BR for past two nights. Is anyone else experiencing this? : r/fitbit
![Fitbit shows weird data. HRV nose dive in one night and shows that I did intense activity although I didn't. What could be the issue? : r/fitbit Fitbit shows weird data. HRV nose dive in one night and shows that I did intense activity although I didn't. What could be the issue? : r/fitbit](https://preview.redd.it/tvq0zv217tw81.jpg?width=640&crop=smart&auto=webp&s=3e0ce0ed0ac198f25ac5d3e90c8b6ab7d9babc16)
Fitbit shows weird data. HRV nose dive in one night and shows that I did intense activity although I didn't. What could be the issue? : r/fitbit
![Fitbit says breathing rate, heart rate variability early indicators of Covid-19 | Technology News,The Indian Express Fitbit says breathing rate, heart rate variability early indicators of Covid-19 | Technology News,The Indian Express](https://images.indianexpress.com/2020/08/fitbit-1200.jpg)
Fitbit says breathing rate, heart rate variability early indicators of Covid-19 | Technology News,The Indian Express
![Heart Rate Variability Fluctuates by Age, Gender, Activity and Time of Day, Fitbit Study Reveals Heart Rate Variability Fluctuates by Age, Gender, Activity Heart Rate Variability Fluctuates by Age, Gender, Activity and Time of Day, Fitbit Study Reveals Heart Rate Variability Fluctuates by Age, Gender, Activity](https://www.wearable-technologies.com/wp-content/uploads/2020/12/Fitbit-heart-rate-variability-study-1.jpg)