"Smovey Rings" are a general health and wellness tool that combine exercise and vibration, which have particular beneficial applications for Parkinson's Disease. Indeed, these hand held "rings" were invented by Johann Salzwimmer, an Austrian Tennis player and a person with Parkinson’s, who actually initially designed them specifically to help himself. So it is not hard to understand why these are proving beneficial now with many other people who also have neurological conditions.
They consist, at the most basic level, of corrugated plastic tubes with some steel balls inside. As one swings the rings, the balls move up and down in the tube, causing significant vibrations that travel up the arms into the brain and body. While the idea is simple, the care and attention with which they have been designed is rather interesting: the color, weight, hand grip material, frequency of vibration, etc., are all supposed to be optimal.