Windows
Compatible applications
Quick Facts
Basic information about this file format
Extension
.HRM
File Type
Polar Heart Rate Monitor Data File
Category
Data
Best first step
Use compatible software
Quick Summary
A practical overview of the .hrm file format
The HRM file extension is a data format primarily associated with Polar Electro heart rate monitors and their legacy training software, such as Polar ProTrain. This file type is used to store detailed physiological and performance metrics recorded during an athletic training session or exercise. An…
File extension
.HRM
File type
Polar Heart Rate Monitor Data File
Category
Data
Recommended action
Open with a trusted compatible app
How to open a .hrm file
Start with a trusted app that supports this format
- Check the file extension carefully and confirm that the file name really ends with .hrm.
- Use software that supports this file type. If one app does not work, try another compatible program for the same platform.
- Update the application if the file was created by a newer version of the software.
- Scan files from unknown sources before opening them, especially documents, archives, scripts, installers, and executable files.
What is a .hrm file?
File extension details and usage information
The HRM file extension is a data format primarily associated with Polar Electro heart rate monitors and their legacy training software, such as Polar ProTrain. This file type is used to store detailed physiological and performance metrics recorded during an athletic training session or exercise. An HRM file is typically structured as a plain text file containing several sections, including a header that defines the exercise parameters—such as date, time, duration, and recording interval—and a data block that lists the actual recorded values. These values often include heart rate in beats per minute, speed, cadence, altitude, and power output, depending on the sensors used during the workout. Because the format is text-based, it allows for relatively easy parsing by third-party fitness analysis software. While modern fitness devices have largely transitioned to more flexible formats like FIT or TCX, the HRM format remains a significant legacy standard for professional athletes and researchers who utilize historical data or specific analytical tools like GoldenCheetah to monitor long-term training loads and physiological adaptations.
Software Compatibility
Programs that may open or work with .hrm files
macOS
Compatible applications
Linux
Compatible applications
Mobile
Mobile applications
Can .hrm files be converted?
Options for saving or exporting this file to another format
In many cases, a .hrm file can be converted by opening it in compatible software and using an option such as Save As, Export, or Convert. The available output formats depend on the file type and the application used.
- Use the original software that created the file when possible.
- Check whether the application supports exporting to common formats.
- Be careful with online converters when working with private, business, or sensitive files.
- If conversion fails, the file may be corrupted, incomplete, encrypted, or not actually a .hrm file.
Why can't I open a .hrm file?
Common reasons this file type may not open correctly
Wrong software
The file may require a specific program that supports the .hrm format.
Incorrect extension
The file extension may have been renamed manually, even though the actual file format is different.
Corrupted file
The file may be incomplete, damaged during download, or transferred incorrectly.
Outdated app
Your software may need to be updated before it can open newer versions of this file format.
Frequently Asked Questions
Common questions about .hrm files
To open a .hrm file, use software that supports this file format.
- Polar ProTrain
- GoldenCheetah
- TrainingPeaks WKO
- Notepad++
- TrainingPeaks (Web)
Open the file in compatible software and look for options such as Save As, Export, or Convert. If no export option is available, the file may require a specialized converter or the original application that created it.
- Verify that the file extension is correct.
- Install or update compatible software.
- Try another application that supports this format.
- Check whether the file is corrupted, incomplete, or encrypted.
A file extension alone does not guarantee whether a file is safe or unsafe. Only open files from trusted sources, scan unknown files before opening them, and be especially careful with executable, script, archive, and document files.
File safety tips
Use caution with unknown files
Only open files from trusted sources. Before opening a .hrm file, scan it with antivirus software, verify that the file extension is expected, and avoid running unknown executable, installer, macro-enabled document, or script files.