I didn't even know what the 'burn zone' data meant until I dug up the information under Heart Rate in settings, and even the pop-up icon on the OLED display isn't all that intuitive. I should get a certain amount of cardio a week, or so my cardiologist says, but the Charge HR doesn't make it all that easy for me to target and achieve those goals. Zones are color-coded as yellow, orange or red (fat-burning, cardio and peak), and on the Charge HR you can see your heart icon in one of three positions to indicate whether you're currently in that zone.

The Charge HR calculates heart rate 'burn zones' based on a formula of 220 minus your age included in the Fitbit profile, but you can customize your own as well in the app. Sometimes, my own heart rate drifted into a 'fat burn' mode, but I knew it was more likely due to having had too much coffee. The problem is, higher heart rate doesn't always mean active exercise. The app tends to count the minutes spent in higher heart-rate target zones and calculate it as exercise. You can customize the activity types in the Fitbit app.įor best results, wait for GPS satellites to lock in on your location before you start.Fitbit's heart-rate charts.

Make sure Bluetooth and GPS are both enabled to use the Connected GPS feature. Some outdoor workouts can track your GPS route and give you more accurate real-time stats like pace and distance when your phone is with you. When you're done, press and hold the button to end your workout and see your stats. To pause and resume your workout, press the button. You can tap to cycle through the different exercise types and press and hold the button to start.ĭuring your workout, tap to view different stats. Use the Exercise menu to start a workout. You can view the automatically detected exercise in your Fitbit app and adjust the duration for each exercise type. Fitbit Charge 2 will automatically detect certain exercises and record them using our SmartTrack feature which automatically recognizes continuous movement at least 15 minutes in length.

Fitbit charge hr 2