Patent ID: 8007422

Claim:
A device for an exercise machine comprising a base ( 3 ), forming at least one substantially flat supporting surface ( 4 ), at least one resistant load ( 5 ) connected to the base ( 3 ), at least one seat ( 6 ) for a user, being positioned in front of the supporting surface ( 4 ), connected to the base ( 3 ) in such a way that it can move from a forward position to a back position relative to the supporting surface ( 4 ), the seat being connected to the resistant load ( 5 ) for performing an exercise; wherein the device comprises at least one footplate ( 7 ) which can be selectively connected to the base ( 3 ) at the supporting surface ( 4 ) by removable supporting means ( 8 ), at least one actuator portion ( 9 ) connected to the supporting means ( 8 ) being designed to generate a vibration for the footplate ( 7 ), the supporting means ( 8 ) comprising at least one base element ( 10 ) designed to support the footplate ( 7 ) in such a way that it is raised and free to vibrate relative to the supporting surface ( 4 ) while the exercise is performed, the actuator portion ( 9 ) being coupled to a shaft ( 16 ) to drive the shaft ( 16 ) in rotation around a first axis ( 17 ), the shaft ( 16 ) having an eccentric portion ( 20 ) defining a second, eccentric axis ( 19 ), parallel to the first axis ( 17 ) and arranged at a predetermined distance thereto, the footplate ( 7 ) being rotatably connected to said eccentric portion ( 20 ), whereby a rotation of the shaft ( 16 ) around the first axis ( 17 ) generates a rotation around the first axis ( 17 ) of the eccentric portion ( 20 ) of the shaft ( 16 ) and of the footplate ( 7 ) coupled thereto, thus generating a vibrating effect for a user having his feet pressed on the footplate ( 7 ).