Audit practice file for "What your workout file reveals when you share it".

synthetic-shared-run.gpx  Hand-written GPX 1.1 with: creator attribute, <metadata><time>,
a track <name>, 5 track points with lat/lon, elevation, a time each, and heart rate in
Garmin's TrackPointExtension namespace. Coordinates are invented (open ocean).
Validated against GPX 1.1 and Garmin TrackPointExtension v2 schemas.
Not exported by WorkoutPort or Strava; it shows the kinds of fields a file can carry, not
what any particular exporter includes.

Editorial validation: the supplied GPX files passed offline XSD validation on 20 October 2026. This checks file structure, not provider acceptance or real recording provenance.