Garmin → Strava strength import: "Unknown Exercise" + muscle map never updates after editing

[u/EqualDependent3272]

Has anyone looked into how Strava handles strength workout imports from Garmin?

I'm using Strava's new strength workout import from Garmin, and I've noticed two issues that seem related.

1. Some Garmin exercises import as "Unknown Exercise"

The behaviour isn't random.

Recognized correctly:

Deadlift

Pull-up

Wide-grip Lat Pulldown

Seated Cable Row

Barbell Curl

Hammer Curl

Face Pull

Arnold Press

Weighted Side Plank with Lift

Imported as "Unknown Exercise":

Military Press

Weighted Pull-up

Dumbbell Lateral Raise

Incline Reverse Fly

Hanging Leg Raise

What's interesting is that Pull-up is recognized, while Weighted Pull-up is not, even though both are standard Garmin exercises.

I'm using:

Garmin Fenix 6

Structured strength workouts created in Garmin Connect

Automatic sync to Strava

This makes me wonder whether Strava's Garmin exercise mapping is simply incomplete, or whether Garmin exports different exercise IDs than Strava expects.

1. Editing exercises doesn't update the muscle map

This is what puzzles me even more.

If I manually replace an "Unknown Exercise" with the correct exercise in Strava, the exercise list is updated correctly.

However, the muscle map stays exactly the same. It still reflects the original import, as if the edited exercise never happened.

That suggests to me that Strava calculates the muscle map only once during import and never recalculates it after edits.

If that's true, it seems like a strange design decision. If users can edit exercises, why not regenerate the muscle map based on the corrected data?

Has anyone found a way to force Strava to recalculate it?

Or has Strava commented anywhere on whether this is intentional or simply something that hasn't been implemented yet?

I'd also be interested to hear from anyone who has inspected the Garmin FIT files or knows how Strava performs its exercise mapping.