Anti-Gravity Treadmill Gait Training for Knee Osteoarthritis

Inclusion Criteria: * Radiologically confirmed knee osteoarthritis (grade 2 or 3 according to the Kellgren-Lawrence classification). * General health and functional status allowing participation in the physical therapy program (based on clinical assessment). * Knee joint pain persisting for at least 3 months, with an intensity of \>= 4 on the Visual Analog Scale (VAS). * Age between 40 and 70 years. * Ability to ambulate independently without any orthopedic assistive devices. * Voluntary written informed consent to participate in the study. * No medical contraindications to physical exercise. Exclusion Criteria: * Knee osteoarthritis grade 4 according to the Kellgren-Lawrence classification or lack of radiological changes (grade 0-1). * History of total or partial knee arthroplasty (joint replacement). * Contraindications to body composition analysis (e.g., implanted pacemaker, electronic implants, epilepsy). * Knee joint instability (e.g., ligamentous injury). * Acute joint inflammation. * Neuropathies, myopathies, or other neurological conditions affecting gait. * Active neoplastic diseases (cancer) or advanced cardiovascular diseases. * Participation in other clinical trials within the last 6 months. * Participation in another physical therapy or rehabilitation program within the last 6 months. * Planned intra-articular injections or injections received in the affected knee joint within the last 3 months. * Regular use of analgesic or anti-inflammatory drugs (NSAIDs, corticosteroids) at doses that could affect the assessment of pain and function.