Knee Osteoarthritis in Elderly People - Gait Analysis

Inclusion Criteria: * participants older than 65 years diagnosed with KOA according to ACR criteria, also accepted in our country; * at least 5 years of disease progression; * painful knee for a period of 48 hours after physical activity; * absence of knee injuries at least 6 months before; * absence of major disturbances in the frontal plane alignment of the knee; * participants with other co-morbidities, but well controlled, like: arterial hypertension, dyslipidaemia and mellitus diabetes type II; a history of a symptomatic or complicated upper gastro-intestinal ulcer; * compliance with physical exercise during the healthcare program. Exclusion Criteria: * unstable medical conditions preventing the patient from participating in the rehabilitation programs, * history of knee replacement, * neurological or any other conditions affecting strength or function of lower limbs.