Our structured swim workouts are based on meters (in the structured workout distance within the workout). However if you have your TP settings set to imperial TP will convert that distance to yards – so although the workout is set to meters, and you can even have your pool distance in your TP settings set to meters, and be syncing the workout to your garmin in meters – the workout card in TP will always do an exact conversion of the meters to yards – due to the master TP settings. There is no option unfortunately to just set swim workouts to a different measurements system.
If you see an odd distance on swim workout card, just open the workout and you will see the actual meters distance there.
This is an issue we find with swimming workouts in all situations other than having your settings in TP on metric and swimming in a meters pool.
Let me know if you have any other questions or if this doesn’t answer your query.