It was designed by the therapist and me after seeing how progress from more generic PT sessions had plateaued short of our goal. Basically a high quantity of precise pressure and controlled movements that were, in her professional estimation, taken as far as possible without risking a regression due to damage or increased pain. My job was to communicate clearly and make clear that I valued progress over comfort at every choice. Quite intense and lengthy, and the 12 hours after had me unsure if her assessment was correct, but it worked out.