5
Getting to know your Fitbit Charge HR
Wearing your tracker
Your Charge HR is designed to be most accurate when worn on your wrist. While it
may track stats such as steps and floors when placed in a pocket or backpack, it is
most accurate on the wrist. For all-day wear, your Charge HR should usually rest a
finger’s width below your wrist bone and lay flat, just as you’d wear a watch.
For best heart rate accuracy you may want to experiment with wearing the Charge
HR higher on your wrist, particularly when exercising. Because blood flow in your
arm increases the farther up you go, moving the tracker up a couple inches can be
helpful. Also, many exercises such as spinning cause you to bend your wrist
frequently, which can interfere with the heart rate signal. Lastly, do not wear your
Charge HR too tight; a tight band restricts blood flow, potentially affecting the heart
rate signal.
Specifying dominant or non-dominant hand
To improve the accuracy of your Charge HR, we ask that you specify whether you’re
wearing it on the wrist of your dominant or non-dominant hand. Your dominant hand
is the hand you use for most day-to-day activities, such as writing or throwing a ball.
You can specify this setting in the Fitbit app or in the Fitbit.com dashboard.
To make this choice using the Fitbit.com dashboard:
1. Log in to Fitbit.com.
2. Click the gear icon in the top-right corner of the dashboard.
3. Click Settings.
4. Using the navigation tabs on the left, find and specify the correct setting for
Dominant Hand.
5. Sync your Charge HR to update your tracker with the new setting.
a. Click the Fitbit Connect icon near the date and time on your computer.
b. Make sure your Surge is nearby and click Sync Now.
Using your Charge HR in wet conditions
Your Charge HR is splash-proof, rain-proof, and can withstand even the sweatiest
workout. Your Charge HR is not designed to be worn swimming. We also
recommend removing your tracker before showering. Though the device can
withstand the water exposure, wearing your tracker 24/7 does not allow your skin to
breathe. After getting your tracker wet, dry it thoroughly before putting it back on.
For more details, see https://www.fitbit.com/productcare.
