For the MWM group, an accessory posterior-lateral gliding movement in the humeral head combined with a movement of active shoulder flexion will be applied. One hand will be placed over the scapula posteriorly while the thenar eminence of the other hand will be placed over the anterior aspect of the head of the humerus

The sham condition will replicate the treatment condition except for the hand positioning. The therapist locates one hand over the belly of the pectoralis major muscle and the other over scapula without applying any pressure. The patient will be asked to move the arm in a similar manner as in the MWM group

Participants were asked to rate the intensity of their pain using an 11-point numerical pain rating scale (NPRS; 0: no pain; 10: maximum pain) for 3 scores of perceived pain: 1, the intensity of shoulder pain experienced in the last 24h; 2, the intensity of shoulder pain at night; 3, the intensity of shoulder pain during shoulder flexion.

A universal goniometer was used to assess the participant's shoulder range of motion in the following motions:

• Pain-free and maximum (painful) range of motion in shoulder flexion
• Pain-free range of motion in shoulder extension
• Pain-free range of motion in shoulder abduction
• Pain-free range of motion in shoulder external rotation
• Pain-free range of motion in shoulder medial (internal) rotation