POLAR S720i - Manual (Page 65)

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Start resetting by pressing and holding the down button. To restart the
same calculation press the OK button or to reset the interval training
exercise, see “Resetting stopwatch to zero” section.
Interrupting an interval or recovery calculation
Press and hold the OK button during your interval training exercise
session to interrupt the calculation. The following section automatically
starts. E.g. if you interrupt an interval your recovery calculation (if set on)
automatically starts.
Interrupting a phase of an interval training exercise
Press the stop button to pause your phase. Press and hold the OK button.
The following phase automatically starts.
Heart touch function
The heart touch function is activated as you bring the wrist receiver near
the transmitter’s Polar logo.
You have three alternatives for the heart touch function. To select heart
touch display, use your Polar Precision Performance software:
• Checking the current heart rate limits
• Swapping the display options
• Storing lap time
During the heart touch, the backlight is on for a couple of seconds, if you
have already used the backlight during the exercise.