Slow additive learning of the Tai Chi Form and exercises and the repetitive nature of practicing the form, along with breathing, amount to a kind of neural programming. It is no accident that this is good for PD, the practices were meant for people over 60, to keep them healthy well into very old age, and to enhance neuroplasticity at a time when it could go into decline. Chi Kung has similar benefits, as do the various forms of yoga. The emphasis in Tai Chi on standing makes it especially good though, as walking and balance suffer in PD.

A good teacher is a must. That means someone who focuses on the detail of the form, and not one who thinks you should be able to master the form in a short period of time.