Inclusion Criteria:  Diagnosis of idiopathic Parkinson's disease by a neurologist based on Parkinson's Disease Society Brain Bank (PDSBB) criteria (Hughes et al.,1992) Disease staging between 1.5 and 3, according to the modified Hoehn and Yahr scale (Hoehn and Yahr, 1967) Regular pharmacological treatment with levodopa (equivalent dose > 300mg) or taking antiparkinsonian medication such as anticholinergics, selegiline, dopamine agonists (amantadine) and COMT (catechol-O-methyl transferase) inhibitors Score of more than 24 points on the Mini-Mental State Examination (Folstein et al., 1975)  Exclusion Criteria:  Associated neurological, musculoskeletal and/or cardiorespiratory diseases that could compromise gait; alcohol or substance abuse disorders; Deep brain stimulation implant; History of brain trauma or neurological disease that would interfere with study procedures.