Acute Effects of Capacitive-Resistive Radiofrequency Therapy in People With Parkinson's Disease

Inclusion Criteria: * Age between 55 and 90 years. Clinical diagnosis of idiopathic Parkinson's disease confirmed by a Neurology specialist. Hoehn and Yahr stage II or III. Functional walking ability. Clinically relevant lower-limb rigidity in at least one leg, defined as a score ≥2 on item 3.3d (right lower limb) or 3.3e (left lower limb) of Part III of the Movement Disorder Society-Unified Parkinson's Disease Rating Scale (MDS-UPDRS). Stable antiparkinsonian pharmacological treatment during the previous 4 weeks, with no planned changes during the intervention period. Ability to understand and follow simple instructions, defined as a score \>24 on the validated Spanish version of the Mini-Mental State Examination (MMSE-MEC). Provision of written informed consent. Exclusion Criteria: * Advanced Parkinson's disease, defined as Hoehn and Yahr stage \>III, with severe postural instability. Other neurological or musculoskeletal conditions that could interfere with the assessment of lower-limb rigidity or gait. Skin lesions, open wounds, or infection in the area where radiofrequency therapy will be applied. Presence of a pacemaker, defibrillator, other implanted electronic device, or another contraindication to TECAR therapy, such as altered thermal sensitivity. Lower-limb surgery within the previous 6 months.