The first thing to do is to read your fitness tracker’s instructions and check the settings so you understand how your device measures your heart rate and interprets the data. Remember, the technology cannot always be 100% accurate but it a baseline guide that can give you some really useful markers when it comes to tracking your own fitness and health as well as your overall progress.  To make the most of what your activity tracker’s heart rate monitor is trying to tell you, check in with the following as you work, rest and play:\r