User Manual

Forerunner 50 Owner’s Manual 15
train mode
6. Press + to set ZO RUN to ON.
7. Press
view to advance to the
RUN LO and RUN HI settings.
Use + and - to toggle or adjust
numeric values for each zone
limit.
Heart Rate Zones
Setting heart rate zone is very similar
to setting speed or pace zones, see
page 14.
Many runners and other athletes are
using heart rate zones to measure and
increase their cardiovascular strength
and improve their level of tness.
A heart rate zone is a set range of
heartbeats per minute. The ve
commonly accepted heart rate zones
are numbered from 1–5 according to
increasing intensity. Generally, heart
rate zones are calculated based on
percentages of your maximum heart
rate.
How Do Heart Rate Zones
Affect Your Fitness Goals?
Knowing your heart rate zones can
help you measure and improve
your tness by understanding and
applying these principles:
Your heart rate is a good measure
of exercise intensity.
Training in certain heart rate
zones can help you improve
cardiovascular capacity and
strength.
Knowing your heart rate
zones can prevent you from
overtraining and decrease your
risk of injury.
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