Interface device to modify the natural pressure distribution of a ski on the snow

An interface device between a ski boot and a ski to modify the natural pressure distribution of the ski on the snow, the device adapted for connection to a median zone of the ski, and to a front binding element and a rear binding element, each binding element comprising a respective base by which each respective binding element is connected to the ski, a body borne by the base, and a support element on which the sole of the boot rests, the rear binding element being mounted on its said respective base adapted to be affixed to the ski, and having a latching means enabling adjustment of the longitudinal position, wherein said interface device comprises:

• a mobile sensor for capturing vertical biases of the boot;
• a return rocking device arranged to transform the vertical biases captured by said sensor into a horizontal traction force;
• a bearing provided to be affixed to the ski towards one end of the ski, said bearing-having a linkage zone located above the upper surface of the ski;
• and
• a linkage element connecting said return rocking device to said linkage zone of said bearing for transmitting the horizontal traction force to the ski by means of said bearing.