Comparison of the Effect of High-Intensity Laser Therapy and Quadriceps Muscle Strengthening Exercises Using Biofeedback on Pain, Stiffness and Function of Patients with Knee Osteoarthritis: A Randomized Clinical Trial

The study findings suggest that both quadriceps muscle strengthening exercises using biofeedback and HILT effectively reduce pain in KOA patients. However, HILT demonstrated superior efficacy compared to biofeedback exercises. These results support the use of HILT as a noninvasive therapeutic modality for KOA, particularly for patients with a higher risk of surgery due to preexisting comorbidities.