Umi Syayyirotin A, Lukitra Wardhani and Fatchur Rochman 1. Differing Effect of an EMG Biofeedback-­Monitored Exercise Compared to an Un-­monitored One in Vastus Medialis Obliquus and Vastus Lateralis Muscles Amplitude in Knee Osteoarthritis. Indonesian Journal of Physical Medicine and Rehabilitation. 1, 1 (1), 27 - 33. DOI:https://doi.org/10.36803/ijpmr.v1i1.189.