Guides
Plain-English guides on workout files: how to merge split rides, combine two devices, fix corrupt files, and pick the format that keeps your data.
How to Merge Two GPX Files Into One Activity
One ride, two GPX files? Merge them into a single activity: line the files up in time order, join them with no lost points, and check the totals before you upload.
How to Merge Two Strava Activities Into One
Strava cannot merge two activities for you — its own help points you to file tools. Here is the clean path: merge the files first, upload once, and tidy the old pair.
How to Combine FIT Files From Two Devices Into One Activity
Your computer has the GPS track and power. Your watch has the heart rate. Combine the two FIT files stream by stream into one complete activity — here is how.
How to Add Heart Rate Data to a GPX File
Your GPX track is clean but has no heart rate, because the strap talked to your watch, not your computer. Merge the watch file in by time and the beats land on the track.
How to Fix a Corrupt FIT File (and Why FIT Files Break)
A FIT file that won't load is often one fault away from fine: a lost ending, a bad checksum, a cut tail. Learn the five ways FIT files break and what repair can save.
FIT vs GPX vs TCX: Which Format Should You Keep?
FIT, GPX, and TCX can all hold a workout — but they do not hold the same workout. A plain guide to what each format keeps, drops, and is best for.
Garmin Activity Won't Upload? How to Fix the File
Garmin Connect rejects the file, the sync spins, or the ride never shows up. Most upload failures are file faults with plain fixes. Work through them in order.
Indoor Workout Files: What to Do When There Is No GPS Track
A trainer ride has no map — and that is correct data, not damage. Learn what an indoor file holds, why some tools misread it, and how to merge and convert it safely.
How to Merge TCX Files and Check That Nothing Was Lost
Merging files is easy. Proving the merge lost nothing is the real skill. Merge TCX files step by step, then run the three checks: points, totals, and stream coverage.
How to Merge Multisport Files Into One Triathlon Record
Swim, bike, run — three files, one race. Merge multisport legs in race order, handle transitions with care, and check the race totals before you share them.