Inclusion Criteria:  All persons with Parkinson disease and ability to follow commands were included in the study. living independently in the community able to walk 6 m independently willing to participate in the study.  Exclusion Criteria:  History of other neurological disorders Musculoskeletal damage which affects walking ability Presence of serious medical condition History of surgical treatments for Parkinson disease Not willing to participate in the study history of faint, vertigo, dizziness,or taking medications which can cause dizziness history of any medical condition which can affect balance.