Effect of High Intensity Laser in Treatment of Myofascial Trigger Points in Symptomatic Knee Osteoarthritis

20 patients received high power laser therapy . Zimmer High power laser applied by laser probe perpendicular to and in slight contact with the skin around knee joint , the total energy was delivered to the patient during one session was 1060 j in 3 phases of treatment.

"20 patients received placebo laser sham laser . The same treatment protocol of HILT was given to the sham group, but the laser instrument was switched off during applications. All laser applications were performed by the same physiotherapist."

"knee osteoarthritis conventional exercises program in form of stretching exercises for both vastus medialis and gastrocnemius muscles , ROM exercises for knee flexion and extension , and isometric strengthening exercise of previously mentioned muscles .~all interventions were done under the supervision of physiotherapist for 30 minutes once a day for 3 days per week during a period of 4 weeks."