After a couple of posts related to Dr. Corcos recent study showing that vigorous exercise at 80-85% maximum heart rate slows or stops PD progression (at least for the duration of the study which I believe was 6 months), I contacted Dr. Corcos by email to get more specific instructions. I heard back almost immediately, so kind of him, here's what he says:
1) Warm up for 5 minutes.
2) Keep your heart rate at 80-85% max heart rate for 30 minutes. One option is a treadmill on which you can increase speed or incline.
3) Warm down for 5 minutes.
This should be done continuously.
It may take you a few weeks to be able to hold 80-85% max heart rate.
I wish you well – best regards – Daniel
I hope this is useful for others, it is for me...