A very simple, but extremely effective therapy for movement recovery and progressive symptom reduction in Parkinson's Disease is to incorporate playing with balls of various sizes, types and textures. The hand-eye co-ordination and sensory feedback provided through balls games seems to open up access to movement considerably well, presumably because it brings in other pathways and regions of the brain in to help.
I can say for sure that incorporating balls into exercise and movement recovery programmes is a technique which has been a most impactful intervention, at least for myself.
While it really is as simple as bouncing a ball, what I believe I am fine tuning here is how optimize the effectiveness.
For myself, when I started playing with balls, this represented an enormous, game-changing breakthrough, in particular because it allowed me to prove to myself that my brain can indeed still move my body when it wants to, and therefore there is nothing inherently permanently broken either with my central nervous system nor muscled/motor neurons.
I hope that others will find ways to use simple bouncing ball techniques, and curiosity and play with balls, to get as much relief from their symptoms as I have.
A major caveat on this is that I later discovered I had an inherited latex allergy, the reaction to which for myself manifests as dystonia symptoms (rigidity, pain and brain fog). In fact, realizing this through playing with balloons and rubber balls helped me make a major breakthrough in easing my symptoms, as the understandings I gleaned of how allergens affect my Parkinson's Disease symptoms set me on a path to discovering and eliminating many personal sensitivities and intolerances, and in doing so this helped everything from pain relief, mood improvement to the PD medicine working better. I now believe that personal (usually unknown) allergen responses may play a very significant role in symptom worsening for a majority of people with Parkinson's. See
IMPACTS OF DIAGNOSIS ON PARKINSON'S DISEASE
for further details of my own journey.
Therefore, I now recommend not touching rubber balls with bare hands, just in case of latex sensitivity, and to wear gloves while playing with them as a precautionary measure.