Which MIME types are related to file extension ".hrm"?
The .hrm file extension is associated with 1 MIME types:
A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.
About .hrm Files
HRM files are files that store heart rate monitor data from exercise sessions. They are commonly used by digital fitness devices, especially those made by Polar.
They record workout details in a binary format. This is why their MIME type is application/octet-stream, signaling that the data isn’t plain text and requires a specific reader.
- Main purpose: Logging heart rate information during physical activity.
- Key fact: They originate from Polar Heart Rate Monitors.
- Additional use: Analyzing exercise sessions with specialized fitness software.
Relationship between file extension and MIME type
A file extension is a suffix at the end of a filename that indicates what type of file it is. File extensions help both users and operating systems identify what application should be used to open the file.
File extensions are typically separated from the filename by a period (dot) and consist of 2-4 characters, though they can be longer. For example, in the filename "document.pdf", ".pdf" is the file extension.
File extensions are closely related to MIME types, as they both serve to identify the format of a file. However, while MIME types are used primarily by web browsers and servers, file extensions are used by operating systems and applications.
Associated MIME types
FAQs
What is an .hrm file?
An .hrm file is a data file created primarily by Polar heart rate monitors to store workout session details. It contains information such as heart rate, speed, cadence, and altitude recorded during physical exercise.
How do I open an .hrm file on my PC?
You can open these files using specialized fitness analysis software like Polar ProTrainer (legacy), SportsTracks, or the open-source application Golden Cheetah. These programs interpret the raw data to display charts and training statistics.
Can I convert .hrm files to GPX or TCX formats?
Yes, converting .hrm files is often necessary to upload data to modern platforms like Strava or Garmin Connect. Tools like GPSBabel or TCX Converter can transform the proprietary .hrm format into standard .gpx or .tcx files.
Why is the MIME type for .hrm files application/octet-stream?
The MIME type application/octet-stream is a generic setting used for binary files that do not have a specific text-based definition. This signals to your computer or browser that the file requires a specific application to interpret the data, rather than displaying it as plain text.
Can I upload .hrm files directly to Strava?
Strava generally does not support direct uploads of raw .hrm files. You will usually need to convert the file to a supported format, such as FIT, TCX, or GPX, before importing your activity.
Are .hrm files text or binary?
While some older versions of the format were text-based, many .hrm files function as binary data dumps from the device. As noted in the description, they are often treated as application/octet-stream, meaning they should be handled by dedicated software rather than a simple text editor.
Where do .hrm files come from?
These files typically originate from older Polar fitness watches or are exported from the Polar ProTrainer PC software. Modern Polar devices usually sync directly to the Polar Flow cloud service, making raw .hrm file management less common today.
General FAQ
What is a MIME type?
A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.
MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.
MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.
How do I find the MIME type for a file?
You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.
Why can one extension have multiple MIME types?
Different programs and historical usage may assign various MIME identifiers to the same file format. Listing them together helps maintain compatibility across tools.