Wear Model FB511
Place Model FB511 around your wrist. If you need to attach a different size wristband, or if you
purchased another wristband, see the instructions in "Change the wristband".
Placement for all-day wear vs. exercise
When you're not exercising, wear Model FB511 a finger's width above your wrist bone.
For optimized heart-rate tracking while exercising:
● During a workout, experiment with wearing the device higher on your wrist (2 finger widths)
for an improved fit. Many exercises such as bike riding or weight lifting cause you to bend
your wrist frequently, which could interfere with the heart-rate signal if the watch is lower
on your wrist.
● Wear your Fitbit device on top of your wrist, and make sure the back of the device is in
contact with your skin.
● Consider tightening your wristband before a workout and loosening it when you're done. The
wristband should be snug but not constricting (a tight wristband restricts blood flow,
potentially affecting the heart-rate signal).
Handedness
For greater accuracy, you must specify whether you wear Model FB511 on your dominant or non-
dominant hand. Your dominant hand is the one you use for writing and eating. To start, the Wrist
setting is set to non-dominant. If you wear Model FB511 on your dominant hand, change the Wrist
setting in the Fitbit app:
From the Today tab
Placement > Dominant.
in the Fitbit app, tap your profile picture > Model FB511 tile > Wrist
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Questions and answers
why do get X when i charge the watch