Mike- You made me curious and I knew I wouldn't be able to go to sleep wondering about what they were-- so I Google Searched--Pages of info---Looks like a lazy mans exercise machine   Maybe she'll tell us more about them.....

Chi Machines

Perfect machine for Cellular Activation, Spinal Balancing, Immune System Improvement, Increasing Blood Circulation, Muscle Relaxation

How do the Chi Enhancers Work? 

Chi machine generates oscillating motion that maximizes the movement of all the body cells without having to lose a lot of energy, put a lot of stress in your body,  or feeling "Over worked".