Diagnose and repair activity files (.tcx) whose per-sample timestamps are decoupled from their GPS positions, which makes Strava and Garmin Connect report a much faster pace over a much shorter moving time than the athlete actually ran. Use whenever a workout "parsed wrong", a run shows a pace that looks too good, moving time is well below elapsed time, someone points at a .tcx or activity export, a Pixel Watch / Fitbit / Wear OS export lands in Drive, or the user says "it happened again" about a previously repaired workout. Also covers re-uploading the corrected file to Strava. Triggers: "Strava says I ran 7:49 but I didn't", "can you parse this tcx", "my watch exported this wrong", "moving time is way off", "fix my activity file", "why is my pace wrong", "upload the corrected run".