Automatic target zone (%/bpm)
The heart rate monitor determines your personal heart rate target zone
limits automatically according to your age-based maximum heart rate (220
minus age). The limits will be determined either in beats per minute (bpm)
or as a percentage (%) of your maximum heart rate. Your date of birth is
required for the receiver to calculate your limits. The target limits
are about 65 and 85% of your estimated maximum heart rate. The most
accurate way to measure your maximum heart rate is to perform a maximal
exercise stress test in a laboratory.
