FAQ: Sync Activities from Other Sources like Garmin, Wahoo, Strava
Duplications of data from Strava & other source?
This can happen if Strava and another source both import the same workout but with slightly different files (for example different moving time or distance). Auto-matching may fail, so both entries stay visible.
Recommandation: Only keep downloads of activities from the original source. Disable the Strava download option if your activities always come from another source. You can also filter activity types from Strava if you have an activity type that is only synced from Strava.
Also note: Strava privacy circles can affect reported distance/time and increase mismatch cases.
Links:
- Matching activities with different distances?
- [SOLVED] Coros data overrides Strava data (Ans: Other sources will override Strava)
Duplicates of data from two sources (not Strava)?
Yes, duplicates can occur when two direct sources send the same workout (or after reconnect/reimport). Non-Strava source combinations are not always deduplicated automatically.
What helps:
- Keep one primary source per device/sport where possible.
- Disable duplicate import paths.
- Clean up existing duplicates on the activity list view by sorting after source or creation date once after changing source setup.
Links:
- Multiple duplicate workouts
- Duplicate Activities after Reconnecting Wahoo
- [SOLVED] Ride Double Up after setting up Zwift (Please Only Allow One Source)
- [SOLVED] Duplicate workouts virtual rides
Strava historical data is missing
As a non supporter, the historical download of data from Strava is limited. Though you can request the full history export from Strava.
Links:
Garmin historical data missing
Garmin limits historical fetches and so historical backfill can be incomplete or fail (for example duplicate/overlapping request issues). In that case, Intervals.icu may not receive all older workouts automatically.
What to do:
- Use full-history import (
Import All Garmin Data). - If specific workouts are still missing, export FIT files from Garmin Connect and upload them manually.
Links:
Why did my Strava or Garmin sync suddenly stop after I did not use Intervals.icu for a while?
What to do: Open Settings → Connections and use Download old data for the affected connection. If you are not a Supporter and have not used Intervals.icu for a while, the connection may have gone dormant. This is usually expected behavior, not a broken sync.
Representative solved threads:
- [SOLVED] Weeks of data missing
- [SOLVED] Strava integration stopped working
- [SOLVED] Runs stopped showing in the calendar (Ans: Strava Dormant.)
- [solved] Workouts from Garmin don‘t import (ans: dormant)
- [SOLVED] Strava not syncing since April (download old data)
“Download All Data” ZIP is too big or does not import
Do not upload the huge Garmin ZIP file directly. Use the download hyperlink from Garmin’s email.
Correct workflow:
- In Garmin’s email, right-click the download link and copy the hyperlink.
- Paste that URL into Intervals.icu
Import All Garmin Data.
Links:
- [SOLVED] ZIP file garmin too big
- [SOLVED] Problème importation historique Garmin
- Garmin data missing 5 week
Why did my activities are missing, after revoking Strava access?
Strava’s T&C does force to delete all data that were previously transfered. You can request your Data from Strava and Import the complete Data with the Email Link you get from Strava.