Effect of 0° and 50° N-K Table Load Angles on Quadriceps Activation in Knee Osteoarthritis

Inclusion Criteria: * Diagnosed with unilateral or bilateral knee osteoarthritis (OA), grade 2 or 3, in the subacute or chronic phase based on the criteria of the American College of Rheumatology (ACR) and Kellgren-Lawrence classification. * Female, aged 50-65 years, based on ACR diagnostic criteria. * Knee flexion-extension range of motion of at least 0-120 degrees. * Normal cognitive function as assessed using the Montreal Cognitive Assessment Indonesia Version (MoCA-INA) (score ≥26-30) Exclusion Criteria: * Knee joint instability due to ligament laxity in the cruciate or collateral ligaments obtained from physical examination (valgus/varus test and anterior/posterior drawer test) or previous supporting examination. * Presence of deformity in the form of genu varus, genu valgus, or genu recurvatum (Q angle 12-20°). * History of knee injury (fracture, ligament rupture, or meniscus) or having undergone knee surgery. * Pain or instability of the ankle joint obtained from physical examination. * Stroke or disorders of the central and peripheral nervous system. * Patients with metabolic diseases such as diabetes mellitus and heart disease or other autoimmune diseases based on medical records in unstable condition with pre-prandial capillary blood glucose ≠ 80-130 mg/dL or 1-2 hours post-prandial capillary blood glucose ≠ \<180 mg/dL, systolic blood pressure ≠ 90-140 mmHg and diastolic blood pressure ≠ 60-90 mmHg. * Pain durin loaded knee extension exercise greatetr than 3 on …