Activity Tracker

The good news? There are more pros than cons. See what one runner thinks about the Fitbit Flex 2 to see if its a fit for you.

We put the new Fitbit Charge 2 to the test. Here's what runners will love about the activity tracker and how to use it on the run.

If you're looking for a running watch that has GPS, heart-rate and activity tracking capabilities, we've found your perfect match.

You can learn a lot from activity tracking—even if you just track your steps.