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Info from Polar on truncating the HRM files(2 posts)

Info from Polar on truncating the HRM filessodade
Apr 17, 2003 7:51 AM
Here is what I got from Polar on this. It appears that, if you follow their method, it will work.

Note for those new to this topic: I was trying to figure out a way to truncate the HRM files for when I forget to stop recording at the end of a ride. (something I seem to do a lot). Here is their offical response:

You can remove unnecessary heart rate measurement data from an exercise file by
editing the HR file of the exercise. A HR file has the .hrm extension. It is
named according to the date when the file was created. The file name is based on
the following format: yymmdd01.hrm, where y means the year, m the month, d the
day and 01 the ordinal of the exercise for that day.
1. Open the .hrm file of the exercise that you would like to edit e.g. in
Windows Notepad. If you are using Polar Precision Performance SW 3 or later the
it is possible to use the a short-cut method. Press Ctrl-key down and then click
the info button that is positioned in the lower right corner of the Exercise
page (the button with a blue circle and the letter "i")
2. Browse to the [HRData] section in the end of the listing.
3. Delete the HR data that you would like to remove. With the help of the HR
Curve graph and Listing you can define the heart rates you need to remove. You
remove also other unnecessary values like altitude, speed and cadence data.
4. Save the file and close the Notepad program.
5. Open the edited file in the software. In the Polar Precision Performance SW
3.0 or later you can open the file by double-clicking the HR curve miniature in
the lower
right corner of the Exercise page.
6. Update the exercise duration by selecting the entire exercise: select Edit -
Select Entire Exercise or press Ctrl+a.
7. Edit the other data (lap times ect.) as desired in the HR curve view.

It is recommended to backup the file before editing.
Great info, Thanks NMtechie470
Apr 17, 2003 5:43 PM