Okay, long title sorry.
Attached is a video plus pictures on ways to prescribe a self-mobilization of the humeral head for your patients. It goes along Mulligan’s philosophy of mobilization with movement and seems to work well if the condition does have a true impingement (and not just a CTJ derangement). I am teaching the Pendulum (or Codmans) MWM to my post-op RTC patients vs the classical way (as shown in a past video below too).
Here is your classical way to perform Codman’s: