Research participants diagnosed with knee osteoarthritis will be randomized through a draw using sealed opaque envelopes indicating two groups: 1. therapeutic exercises, 2. therapeutic exercises + chronic pain neuroscience education program. The primary outcome will be functional performance using a patient-reported measure, the Knee Injury and Osteoarthritis Outcome Score (KOOS). The selected secondary outcomes will be pain intensity by the numerical pain scale (END), physical function reported by the patient by the patient-specific functional scale (EFEP), Pain self-efficacy questionnaire (PSEQ), functional mobility by the timed up and test (TUG), general effect perceived through the global perception scale (EPG), muscle strength through Maximum Voluntary Isometric Contraction (MVIC) and functionality and disability through the World Health Organization Disability Assessment Schedule (WHODAS).