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.