Filter
Top Products
Forerunner 405 Owner’s Manual 45
Appendix
Problem Solution/Answer
Some of my data
is missing from my
Forerunner.
The Forerunner overwrites the oldest detailed data if
you do not transfer it to your computer. Transfer data
regularly to avoid losing data.
Heart Rate Zone Table
% of Maximum
Heart Rate or
Resting Heart
Rate
Perceived Exertion Benets
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 difcult
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