Precor Precision Series Owner's Manual page 23

The following graph shows how your effective heart
rate ranges vary with your age.
Figure 15: Heart rate target zones
Measuring Your Heart Rate
On the Workout List, you can find several heart rate
workouts (refer to Available Workouts). These workout
courses automatically manage your heart rate at a
target level based on your age. By monitoring your
heart rate and making changes to the equipment's
settings as you exercise, the workouts keep your heart
rate within a few beats per minute of the target rate.
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