If you connect your Fitbod app to Strava, you may notice that workouts are duplicated in your iPhone fitness app.
Here’s how to solve the issue.

Go on your Fitbod app, tap on log, then tap on the settings icon in the right upper corner, select Strava under connected apps and then uncheck Import Workouts from Strava as seen below

This will continue to allow your Fitbod workouts to be posted in Strava without duplicating the workouts on your Apple Health and iPhone fitness app workout list.