Abstract: A ski includes a base plate (2) and a raised, central platform (3). A front supplemental element (6a) is removably attached to a front end of the platform and has a pair of longitudinal arms (60, 61) extending forward along a top surface of the base plate. Similarly, a rear supplemental element (6b) is removably attached to the rear of the platform and has a pair of longitudinal arms (62, 63) which extend slidably along the top surface of the base plate. The supplemental elements are removably attached using a tongue (8a, 8b) and slot (9a, 9b) arrangement and a latch (10, 11, 100). A visual indicator (11, 12; 15, 16) indicates when the supplemental element is properly connected. The supplemental elements include a basic structure (600) with supplemental reinforcing elements (601) removably attached to the undersides of the longitudinal arms.

Abstract: A board for gliding has an upper face which includes a zone for fitting the binding. The fitting zone is centered with respect to the point for fitting the mid-point of the boot, and receives the toe stop of a binding in its front portion and the heel binding in its rear portion. The board includes a step between the front portion of the fitting zone and the rear portion of the fitting zone, and is modified such that gliding board at the front portion of the fitting zone is thicker than the gliding board at the rear portion of the fitting zone.