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Burn zone because a higher percentage of
calories are burned from fat, but the total
calorie burn rate is lower.
Between 70% and
84% of your
maximum heart rate
This is a medium-to-high intensity exercise
zone. In this zone you're pushing yourself but
not straining. For most people this is the
exercise zone to target.
Greater than 85% of
your maximum heart
rate
This is a high-intensity exercise zone. This zone
is for short intense sessions that improve
performance and speed.
Note that the heart-rate value appears gray if your watch is searching for a stronger reading.
Custom heart-rate zones
Set a custom heart-rate zone or a custom max heart rate in the Fitbit app if you have a specific target in
mind. For example, elite athletes might have a target that differs from the American Heart Association’s
recommendations for most people.
For more information, see help.fitbit.com.
Share your activity
After you complete a workout, sync your watch with the Fitbit app to share your stats with friends and
family.
For more information, see help.fitbit.com.
Control music with Model FB523
Control music and podcasts playing on Model FB523 or on your phone.
For instructions, see help.fitbit.com.
Fitbit Pay
Model FB523 includes a built-in NFC chip, which lets you use your credit and debit cards on your watch.
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