Garmin Activity Not Syncing?
Sync failures can come from connectivity, service or file-level problems. If you can obtain the activity FIT file, ActivityDoctor can check whether the file itself is structurally healthy.
Drop your .FIT file here
Analysis runs locally in a Web Worker. Your workout file is not uploaded.
FIT health report
Activity stats
Average heart rate —
Max heart rate —
Average cadence —
Average power —
Private route map
Vector-only track visualization. No map tiles or GPS coordinates are requested from a third-party map service.
Recovery estimate
Repair & recovery options
Detected anomalies
Activity record sample
The interface downsamples very large activities for display. Repair logic works from the complete local file.
| # | Time | HR | km/h | Altitude | Cadence | Power |
|---|
Before repairing the file
First retry the normal device/app sync and confirm the platform is reachable. If the activity exists on the device but a manually obtained FIT file is rejected, file diagnosis becomes useful.
What ActivityDoctor can tell you
The local validator can identify length/CRC problems, parsing failures, missing summaries, timestamp issues and recoverable Record messages. This does not diagnose account, Bluetooth or platform service outages.