Bladder Complaints in Parkinson's Disease Effectiveness of Pelvic Floor Muscle Exercises and Electrical Stimulation

The goal of this clinical trial is to compare the effect of pelvic physical therapy with different types of electrical stimulation(ES) for bladder complaints in people with Parkinson's disease. The main question it aims to answer is: What is the effect of pelvic physical therapy with ES for bladder complaints in people with Parkinson's disease. Secondary question: What is the most effective type of ES on bladder complaints in people with Parkinson's disease. Participants will be randomized into three groups. Two different kinds of ES and a sham group. Participants will receive eight session of pelvic physical therapy. Pelvic physical therapy consists of e.g. bladder training, pelvic floor muscle exercises and biofeedback.