I was impressed by the article on NBC about riding a recumbent bike for three times a week at an RPM of 80-90 for 45 mins each time. If anyone is also doing this exercise could you please advise if your PD improved and how long it took to see any results. I bought a recumbent bike three weeks ago and have been doing 5 miles a day so far. I am also on Sinemet 25/100 3x/day. I would really appreciate any advice you can pass on. The article was very positive about the results. Many thanks.