The primary goal of this clinical trail is to compare the effect of a five-week specific motor interventions on the postural alignment, trunk range of motion and spine function in patients with Parkinson's disease. The secondary goal is to investigate the effect of specific motor interventions on pain, balance, gait, and quality of life. Participants will: be randomly allocated to a control group or an exercise group and will perform 50 minutes of exercise twice a week, including stretching, core exercises, gross motor movements and balance exercises for 5 weeks. Each group will be assessed for posture, trunk range of motion, spine function, pain, balance, gait, and quality of life before and after the intervention.