Icon Zone Calculation Description
Below
Zone
Below
40%of
your heart
rate
reserve
Below the fat burn zone, your
heart beats at a slower pace.
Fat Burn
Zone
Between
40% and
59% of
your heart
rate
reserve
In the fat burn zone, you’re likely in
a moderate activity such as a brisk
walk. Your heart rate and
breathing might be elevated, but
you can still carry on a
conversation.
Cardio
Zone
Between
60% and
84% of
your heart
rate
reserve
In the cardio zone, you’re likely
doing a vigorous activity such as
running or spinning.
Peak
Zone
Greater
than 85% of
your heart
rate
reserve
In the peak zone, you’re likely
doing a short, intense activity that
improves performance and speed,
such as sprinting or high-intensity
interval training.
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