SMARTFIT BY TOOLMITRAA
FIT Start Extender
Recover a missing activity beginning by supplying a GPX segment that ends at the original activity start.
What this tool does
- Detailed GPX geometry rather than a straight chord
- Endpoint proximity validation
- Estimated time and speed generation
- HR, power and cadence left missing rather than fabricated
Non-destructive workflow
SmartFIT works on an in-memory copy and exports a new file. Keep the original activity as your backup, especially before structural edits.
Frequently asked questions
Does this overwrite my original file?
No. SmartFIT exports a new result and does not modify the source file on disk.
Can I inspect the result before saving?
Yes. The current activity can be reviewed in SmartFIT Editor and Analyzer before export.
More SmartFIT tools
FIT Tools Suite · FIT File Editor · FIT File Repair · Smart FIT Generator · Cycling Activity Generator · Running Activity Generator · Cycling Route Builder · GPX to FIT · FIT Converter · Activity Analyzer · Activity Library · Athlete Twin · Personal Heatmap