FitConvert

12/1/2025

KML Files and Fitness Data: Built for Maps, Not Metrics

How KML turns workouts into visual experiences in Google Earth and Maps

A KML file (Keyhole Markup Language) is an XML-based file format used to display geographic data in mapping applications like Google Earth and Google Maps. It is designed for visualization rather than fitness analysis, making it useful for viewing routes, paths, and locations on a map.

KML files are commonly used to share and explore geographic information in a visual and interactive way.

What data does a KML file contain?

KML files can include:

  • GPS coordinates
  • Routes and paths
  • Waypoints and markers
  • Visual styling such as colors and line thickness
  • Location metadata

KML focuses on how data is displayed rather than how workouts are analyzed.

When should you use a KML file?

KML files are best when you:

  • Visualize routes or activities on a map
  • Share workouts in a visual format
  • Present geographic data in tools like Google Earth
  • Explore locations interactively

Limitations of KML files

While useful for visualization, KML files have important limitations:

  • Not designed for fitness metrics like heart rate or power
  • No support for structured workouts or training data
  • Limited compatibility with fitness-focused platforms
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