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Text on the display
Symbol Explanation
Zone pointer (Polar sport zones)
Target zone indicator with a
heart symbol that moves left or
right on the sport zone scale
according to your heart rate. For
further information on setting a
sport zone see Button Functions
During Exercise.
Target zone
A graph showing your actual
heart rate compared to the set
heart rate zones.
*Optional S1 foot pod required.
Button Functions During Exercise
Take a Lap
Press OK to record a lap. The display will show:
Lap number
Average heart rate of the lap
Lap time
If the foot pod* is activated, the following will also appear:
Lap number
Lap distance
Average speed/pace of the lap
Lock a Zone
When training without preset target zones, you can lock your heart rate to the current sport zone. This
way, if you haven’t had time to define preset target zones prior to exercise, you can set a target zone
on the go during a session.
To lock/unlock the zone, press and hold OK.
During programmed exercises: Press and hold OK and select Lock zone/Unlock zone from the Lap menu.
If, for example, you are running with a heart rate of 130 bpm which is 75% of your maximum heart
rate, and matches sport zone 3, you can press and hold OK to lock your heart rate into this zone. Sport
zone3 Locked 70%-79% is displayed. An alarm sounds if you are below or above the sport zone (if the
target zone alarm function is on). Unlock the sport zone by pressing and holding OK again: Sport zone3
Unlocked is displayed.
Using the software, you can also base ZoneLock on your speed/pace*. For further information, see
software help.
Zoom the Display
Press and hold UP to zoom into the upper row, and DOWN to zoom into the middle row. Return to the
normal display by pressing and holding the buttons again.
Polar RS400 User Manual 14