User Manual

16 Forerunner 50 Owner’s Manual
train mode
You can set the low and high heart
rate limits on your Forerunner. If
you know your maximum heart rate,
you can use the following table to
determine the best heart rate zone for
your tness objectives:
If you do not know your maximum
heart rate, use one of the calculators
available on the Internet.
Zone % of Max.
Heart Rate
Perceived Exertion Benets
1 50–60% Relaxed, easy pace;
rhythmic breathing
Beginning-level aerobic
training; reduces stress
2 60–70% Comfortable pace;
slightly deeper breathing,
conversation possible
Basic cardiovascular
training; good recovery
pace
3 70–80% Moderate pace;
moredifculttohold
conversation
Improved aerobic
capacity; optimal
cardiovascular training
4 80–90% Fast pace and a bit
uncomfortable;
breathing forceful
Improved anaerobic
capacity and threshold;
improved speed
5 90–100% Sprinting pace,
unsustainable for long
period of time; labored
breathing
Anaerobic and
muscular endurance;
increased power
190-00839-00_0D.indd 16 7/31/2007 1:48:37 PM

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