Apart from soccertese who thinks that the neuro is exaggerating a bit, I'm surprised that no-one else has questioned the comment made in post #1 that:

"my neuro told me if all his patients exercised they'd [be] 99.9% symptom free."

A 99.9% decrease in symptoms would, in effect, be a cure: your tremor reduced to a fraction of a millimetre or to less than a minute per day, your falls reduced to one every 10 years, your walking speed reduced from 4mph to not less than 3.996mph ...

Where are these people?

I don't want to deter people from exercising. I recommend it to all PwP who can do it safely, and even to some of those who can't - being sedentary comes with its own set of risks.

But, I think it is important to be realistic in our expectations of the benefits of exercise.

John