Forerunner 210 Owner’s Manual
Training
Heart Rate Zone Calculations
Zone % of
Maximum
Heart Rate
Perceived Exertion
Benefits
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 difficult 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
