Quote ........." The only way to sort out the problem is to 'unstick' the capsular adhesions, which is done using a technique called glenohumeral capsular hydrodilation. "

as far as i am aware injecting frozen shoulders is a contraversial approach and has poor evidence to back it up.......it is certainly not the only way to sort out the problem.

If there is a capsular restriction then get it moving! That is what the shoulder is there for after all! obviously the more painful ones you go gently at first and i'm all for neurodynamic exercises in the early stages. But when it is chronic......push it.......not with mobs (no long term benefit) but with appropriate exercise.