I was dx with PD 9 years ago and started having balance problems 2 years ago.I tried dance therapy and it worked while I danced but reverted back as soon as I stopped.I am 80 years old and my stamina is reduced,so bike therapy is not for me.My mds recomended physical therapy.If any of you has tried physical therapy would tell me if it was suiccessful.Also if any one has any other treatment for balance,I would be appreciative.