Inclusion Criteria:  a diagnosis of idiopathic Parkinson's disease have decreased cognitive functions but do not interfere with functional independence Montreal Cognitive Assessment (MoCA): 21-25 able to walk independently without walking devices for at least 10 meters and with the ability to turn 180°  Exclusion Criteria:  a diagnosis of dementia other diseases that may influence cognitive functions or walking performance a history of brain surgery modification of the medication during the exercise intervention