Hi M,

We don't have a frozen shoulder case study specifically but these 2 workouts give some great guidelines.
I https://pilatesology.com/classes/shoulder-injury-workout/
https://pilatesology.com/classes/injury-and-application-of-the-method/

I once had a client with frozen shoulder and she improved to the point where she could use her arm again with Pilates. I did not let her use her injured arm at all during her workouts except to move it within the range of motion (very little movement) that she knew had no pain and without any spring or weight, etc...

All the best!
Alisa