![Hands-on: Fitbit's new Flex 2 and Charge 2 Activity Trackers, plus Blaze & Alta updates | DC Rainmaker Hands-on: Fitbit's new Flex 2 and Charge 2 Activity Trackers, plus Blaze & Alta updates | DC Rainmaker](https://media.dcrainmaker.com/images/2016/08/Fitbit-Charge-2_Fitbit-App_iOS_Cardio-Fitness_Ryan-Hall.png)
Hands-on: Fitbit's new Flex 2 and Charge 2 Activity Trackers, plus Blaze & Alta updates | DC Rainmaker
![Has anyone seen their Cardio Fitness Heart Rate improve while using the Fitbit? Or has anyone worked to improve it and seen results? (I have attached a picture for an example/clarity) : Has anyone seen their Cardio Fitness Heart Rate improve while using the Fitbit? Or has anyone worked to improve it and seen results? (I have attached a picture for an example/clarity) :](https://i.redd.it/tk1333va2ab11.jpg)
Has anyone seen their Cardio Fitness Heart Rate improve while using the Fitbit? Or has anyone worked to improve it and seen results? (I have attached a picture for an example/clarity) :
![fitbit on X: "Cardio doesn't have to be hardio. What would you add to this cozy set up? https://t.co/Agy0uo1Xfh" / X fitbit on X: "Cardio doesn't have to be hardio. What would you add to this cozy set up? https://t.co/Agy0uo1Xfh" / X](https://pbs.twimg.com/media/F9N7cSCXsAYeSWP.png)