I agree that the video is confusing and leaves out some important data. For instance, how long and how fast a PD patient has to peddle to see a benefit. I think it has been known for a long time that exercise is beneficial to PD patients. I know that playing soccer helps me, but it doesn't stop my tremors completely. Does the steady rhythm of the pedaling of a bike have something to do with the seemingly improvement experienced by PD patients? What experiments were done and what were the results? It seems to me that this is at least an indication that there is some very important things to be learned about the relationship between the brain and the rest of the body. I am going to study this more deeply.

best wishes, Howard Davis