Known as Training Center XML files, TCX documents, are specifically created to store fitness data, covering session info, pulse data, location points, and critical athletic measurements. These files are generated through multiple exercise monitors, mapping gadgets, and platforms like Garmin Connect. https://www.filemagic.com/en/data-files/tcx-file-extension/tcx-files-what-it-is-and-how-to-open-it/