POLAR S725 - Manual (Page 58)

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1. Start from the Time of day display. Press OK to enter the Measuring mode.
2. If you want to swap the preset exercise set, press and hold the up button
until the exercise set (E1-E5) is swapped. Release. Repeat until desired
exercise set is displayed.
3. To start exercising and recording the preset exercise type press OK.
Starting an exercise set
3. Select the lower heart rate information row
Press and hold the down button to select from the following:
Current heart rate, average heart rate (avg) or the reading in
percentages of your maximum heart rate (% max) if you have set your
user information.
You can only change the displayed function of the lower row if the
stopwatch is on.
Resetting the stopwatch to zero
1. Pause your exercise.
2. Press and hold the down button until the stopwatch is reset. Release.
3. Press OK to restart the stopwatch and recording. Or, to return to the
Time of day display, press and hold the stop button. As a result of
resetting your stopwatch, the previous exercise file is deleted.