POLAR S720i - Manual (Page 59)

C 57
A. Manual interval.
Number of set intervals.
Current interval number.
Interval time.
Heart rate information.
If you selected manual interval your interval will end as you
press and hold OK.
Or
B. Time-based interval.
Countdown timer 2.
If you selected time-based interval your interval will end as
you reach the preset time.
Or
C. Heart-rate-based Interval.
The difference between the preset interval heart rate and
current heart rate.
Or
D. Distance-based interval.
Countdown distance.
Your interval will end as you reach the preset distance.
3. At the end of Interval
Interval duration.
Average heart rate of the interval.
When your interval ends the wrist receiver automatically
continues with following preset function: recovery
calculation or cool-down phase.