POLAR S725 - Manual (Page 61)

C 59
Interval session
1. First
Preset heart rate limits 2 (if set on).
2. Then
One of the following is displayed depending on your settings:
A. manual, B. time-based, C. heart rate-based or
D. distance-based interval.
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.