Yes, for most workshops therapists will be asked to prepare by doing some analysis tasks or pre-reading, to help introduce topics and content covered on Day 1.
The pre-reading and homework materials are available free of charge for the upper limb retraining workshop on this website (see "Resources' at the bottom of the home page). Organisers ask registrants to access these materials a few weeks before the workshop.
For other workshops, pre-reading materials are emailed to organisers and participants in advance.