Unfortunately, for the cycling to work, the patient needs to go for at least 40 minutes at 60-80 rpm three times per week. Add 10 min of warmup and cooldown. Keep the heart rate at 60-80 of maximum heart rate (220-age). Most people have to build up to that, but it is possible. In addition to cycling and meds (6mg ReQuip XL/day) another PD patient taught me to use a form of self-hypnosis to control the tremor. I was dubious, but found that by being still and saying "Quiet hand" on breathing in and "Peace" on breathing out my tremor usually stops, especially when I'm trying to go to sleep and I keep patting myself!