Fitbit Zip FB512, User Manual

Page: 31 / 57

31
Default heart-rate zones
Default heart-rate zones are calculated using your estimated maximum heart rate. Fitbit calculates your
maximum heart rate with the common formula of 220 minus your age.
Zone Calculation Description
Out of Zone Below 50% of your
maximum heart
rate
Your heart rate may be elevated, but not enough
to be considered exercise.
Fat Burn Between 50% and
69% of your
maximum heart
rate This is a low-to-medium intensity exercise zone.
This zone may be a good place to start for those
new to exercise. It's called the Fat Burn zone
because a higher percentage of calories are
burned from fat, but the total calorie burn rate is
lower.
Cardio 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.
Peak 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 .