Comparison of Two Different Dual-Task Training Methods in Patients With Parkinson's Disease

The aim of this study is to compare the effectiveness of motor-motor dual-task training and cognitive-motor dual-task training in patients with Parkinson's disease.The main questions it aims to answer are: \- Whether there is a difference between motor-motor dual-task training and cognitive-motor dual-task training in patients with Parkinson's disease in terms of their effects on motor symptoms, balance, gait, functional mobility, activities of daily living, dual-task activities, cognitive functions, and balance confidence. Researchers will compare single-task training, motor-motor dual task training and cogvitive-motor dual task training. Participants will: * Receive exercise training at the study clinic twice a week for approximately 45 minutes each time, for 6 weeks. * Participate in assessments at the study clinic before and after exercise training.