Abstract: A ski (10) includes a body (22) formed from a primary core (28) reinforced by a structural layer (30) that wraps the primary core. A secondary core (24) is disposed above the body and adhered thereto with an elastomeric layer (32). A top layer (40) overlies the secondary core and the exposed portions of the body to integrate the secondary core into the ski. The ski further includes a bottom layer (34) reinforced with edge strips (36). The secondary core (24) provides additional mass at selected regions of the ski without significantly impacting the stiffness of the ski, thereby affecting the dynamic profile of the ski.

Abstract: A binding lifter for a ski includes a fastener retention layer, a lifter core extension above and below the fastener retention layer and an exterior layer over at least a portion of the lifter core. The fastener retention layer has a greater density than the lifter core. Binding fasteners are securable to the fastener retention layer.

Abstract: A board, such as a ski or snowboard, that includes a piezoelectric damper. A sensor such as a piece of piezoelectric material is located on the body of the board such that, as the board vibrates or deforms, the piezoelectric sensor is also deformed. As the piezoelectric sensor deforms, it produces an electrical signal that is provided to a control circuit. The control circuit receives the electrical signal and generates a control signal of proportional amplitude and frequency, but an inverse waveform to the sensed vibration. The control signal causes a piezoelectric damper to stiffen and resist deformation of the board, thus damping the vibration. The sensed signal may also be stored within a memory device and subsequently downloaded to provide a skier profile for analysis.