Have the medical benefits of Keyton chairs been tested?

Yes. According to the kinesiology research unit of the University of Valencia, Keyton's MMS Multimassage chairs significantly reduce muscular stress, much more than traditional means of rest. The us of a Keyton Massage Chair is recommended in two different situations: before stressful activities, because it delays the signs of muscular stress in the back, and after stressful activities as it decreases stress by at least 42%, thus contributing to muscular relaxation and rest.