![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
![Fitbit Charge 5 Advanced Health and Fitness Tracker with Built-in Gps, Stress Management Tools, Sleep Tracking, 24/7 Heart Rate and More, Lunar White/Soft Gold, One Size (S L Bands Included) : Amazon.ca: Fitbit Charge 5 Advanced Health and Fitness Tracker with Built-in Gps, Stress Management Tools, Sleep Tracking, 24/7 Heart Rate and More, Lunar White/Soft Gold, One Size (S L Bands Included) : Amazon.ca:](https://m.media-amazon.com/images/I/814vFxVZFbL._AC_UF350,350_QL80_.jpg)
Fitbit Charge 5 Advanced Health and Fitness Tracker with Built-in Gps, Stress Management Tools, Sleep Tracking, 24/7 Heart Rate and More, Lunar White/Soft Gold, One Size (S L Bands Included) : Amazon.ca:
![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)