A 43 year old female patient presents with generalized pain, weakness and decreased range of motion in her left knee.  She states that the knee always feels weak like it’s going to give out.  TS line revealed a weak right PMC and a bilateral PMS weakness.  After IRT treatment to her old injuries she had an immediate increase in knee flexion (to about 90 degrees) and 100% reduction of her pain. The knee still felt weak and tight to move. I did IRT to the left quadriceps origin and insertion. The patient then had almost full knee flexion and could do a deep knee bend without feeling the knee would collapse. The right PMS and PMC were now strong and the left PMS remained weak.