Strengthening Program for Foot-ankle Muscles in People With Knee Osteoarthritis

Inclusion Criteria: * Knee osteoarthritis (KOA) based on clinical and radiological criteria of American College of Reumathology; * KOA (Grade II and III - Radiological classification of Kellgreen and Laurence) in medial compartment of knee; * Knee pain between 30 and 80 on the visual analogue scale; * BMI \< 35 kg/m2. Exclusion Criteria: * KOA isolated (Grade II and III - Radiological classification of Kellgreen and Laurence) in lateral compartment of knee; * Lower limb strength training (3 times per week); * Wear minimalist shoes for at least 6 hours a day and 5 days a week; * Physical therapy in the previous 3 months; * Having received steroid injections and hyaluronic acid intra-articular knee in previous periods of three and six months respectively; * Previous history of surgery on knees, ankles and hips in the last 2 years; * Neurological disease; * Inflammatory arthritis (eg. rheumatoid arthritis); * Asymptomatic OA of one or both knees.