POLAR S610i - Manual (Page 46)

C 44
Interval Phase
The receiver records up to 30 repeated interval phases. Your interval phase
is divided into interval and recovery calculation (if set on) sections, which
alternate continuously through your interval phase.
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 or C. heart-rate-based interval.
A. Manual interval
Number of set intervals.
Current interval number.
If you selected manual interval your interval will end as you
press and hold OK.
Or
B. Time-based interval
Countdown timer.
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.
If you selected heart-rate-based interval your interval will
end as you reach the preset heart rate reading.