To enhance training effectiveness by sensing a change in distribution of sole pressure according to bodily motions, and making the motions sensed compositely with integrated stimulation of a consecutive click feeling generated on the occasion, and light, sound, and vibration, etc. output according to sensed signals.

A hard flexible member 1 capable of being restored from deflection is used for a first layer of a dome spring type switch in which foot pressure facing a footwear pedestal acts directly in order to conduct an electric contact 3 simultaneously with a click feeling sensed by a sole of the dome spring type switch. Thereby the strength of the foot pressure is converted into a vertical movement narrowed down to one point in the center and a dome spring 2 of a second layer is pushed in and released without deforming the shape of the dome spring 2, and accordingly, the electric contact 3 can be reliably conducted and disconnected.