Inclusion Criteria:  Confirmation of clinical diagnosis of osteoarthritis according to the criteria established by the American College of Rheumatology; OA knee radiograph grades 2 - 4 according to the Kellgren-Lawrence scale; Reporting knee pain with minimum intensity of 3 on Numerical Pain Scale; Complaints of pain and functional reduction in the last three months;  Exclusion Criteria:  Diabetes type I or decompensated; Peripheral vascular disease; Uncontrolled hypertension; History of deep vein thrombosis; History of stroke; History of cancer; Cardiac pacemaker; Cognitive disorders; Neurological deficits (sensory or motor) Body mass index above 40 kg/m2 Hip symptomatic osteoarthritis Low back pain Use of painkillers in the last 24 hours; Intra-articular infiltration with hyaluronic acid and corticosteroids in the last 6 months; Orthopedic surgery on lower limbs; Systemic inflammatory disease; Not able to walk