EMG of Gait Under Dual-Task in Parkinson Desease

Inclusion Criteria: * Ability to walk independently for at least 5 meters, both forward and backward, without the need for assistive devices or assistance from another person. * Diagnosis of idiopathic Parkinson's disease made by a neurologist at Hospital Virgen Macarena. * Hoehn and Yahr stage I-III. * Being in the "ON" phase of antiparkinsonian medication during the assessment (approximately one hour after intake, when the pharmacokinetic curve of levodopa reaches its peak). Exclusion Criteria: * Presence of symptomatic musculoskeletal disorders affecting the lower limbs (LL) (relevant orthopedic surgery or leg length discrepancy \> 1 cm), or other neurological conditions (stroke, neuropathies, etc.) that independently affect gait. * Balance disorders due to other causes (vestibulopathy, severe orthostatic hypotension, etc.). * Decompensated systemic diseases (cardiac disease, COPD, uncontrolled diabetes mellitus, etc.). * Uncorrected visual impairments that may affect gait performance. * Previous treatment with deep brain stimulation.