DISCUSSION
The purpose of the study was to determine whether soft tissue mobilization (STM) with proprioceptive neuromuscular facilitations (PNF) are effective in producing an immediate improvement in glenohumeral external rotation, at 45° of shoulder abduction and overhead reach in patients with shoulder impingement syndrome. The results of this study proved that the STM with PNF is more effective in improving the glenohumeral external rotation and overhead reach. The subjects of Group A, who underwent the treatment of STM with PNF were assessed for immediate changes in pain, glenohumeral external rotation and overhead reach. The study shows significant improvement in pain with 2.8 levels in the VAS and overhead reach up to 12 cm in average. When compared with Group B, who underwent the treatment of ultrasound therapy. The results of this study was in agreement with the results was obtained by the research work done by Joseph J. Godges, et al5). The main reason for the increase in the range of motion and the overhead reach is that the STM helps in reducing the tightness and it promotes changes in myofascia allowing the elongation of the shortened structures. PNF is effective in increasing the range of motion and its reciprocal activation of agonist and antagonist provides the greatest potential for muscle tendon as it lengthens the Golgi tendon organ which stimulates relaxing the antagonist muscles. When PNF is applied and the patient is told to contract the muscle in internal rotation against the resistance and the muscle tension develops, the GTO fibers inhibits alpha motor neurons activity and decreases tension in the muscle tendon, so for the neuromuscular system, inhibition is the state of decreased neuronal activity and altered synaptic potential which reflexively diminishes the capacity of a muscle to contract. As the capacity of muscle to contract decreases the arm is moved to external rotation, the antagonists are contracted and antagonist muscles are relaxed and again tension is developed in the agonist muscles. This GTO monitors the excessive tension during muscle contraction and thus inhibits the excessive contractions6, 7). The shoulder rotation at the position of 45° of abduction was adopted for soft tissue mobilization and proprioceptive neuromuscular facilitation because at this position subscapularis muscle flexibility deficit is major cause than any capsular restrictions which is mainly the cause of restriction at 90° of glenohumeral external rotation3, 4). While