![Fitbit Charge HR, Surge activity trackers can now detect workouts, better track your heart rate - CNET Fitbit Charge HR, Surge activity trackers can now detect workouts, better track your heart rate - CNET](https://www.cnet.com/a/img/MRJervm3lDksR1kzJ2TBi0Z-_xs=/940x0/2015/11/20/3572e87e-e894-48de-b597-15e8a096739a/fitbit-primary-exercise-screen-goal-met.png)
Fitbit Charge HR, Surge activity trackers can now detect workouts, better track your heart rate - CNET
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![With the SmartTrack algorithm and some serious waterproofing onboard, the Flex 2 can track your swimming activity. - ShuffleRun With the SmartTrack algorithm and some serious waterproofing onboard, the Flex 2 can track your swimming activity. - ShuffleRun](https://www.shufflerun.com/wp-content/uploads/2016/10/fitbit-flex-2-swimming-tracking.jpg)
With the SmartTrack algorithm and some serious waterproofing onboard, the Flex 2 can track your swimming activity. - ShuffleRun
![Fitbit Charge HR, Surge activity trackers can now detect workouts, better track your heart rate - CNET Fitbit Charge HR, Surge activity trackers can now detect workouts, better track your heart rate - CNET](https://www.cnet.com/a/img/RMDY4iKIUiOPgVKxy9QkO22ocPg=/940x0/2015/11/20/a8f6a8dc-35bf-414a-b355-dad0ec24c1f0/fitbit-goal-setting-screen.png)