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A binding system for a recreational board is mounted atop a rider-support surface of the board. The binding system comprises: a pair of rails locatable on opposing sides of a generally flattened foot-receiving surface for the rider's foot, each rail comprising a central portion mountable to the recr

A binding system for a recreational board is mounted atop a rider-support surface of the board. The binding system comprises: a pair of rails locatable on opposing sides of a generally flattened foot-receiving surface for the rider's foot, each rail comprising a central portion mountable to the recreational board, a toe-side leg which extends from the central portion toward a toe-side of the recreational board and a heel-side leg which extends from the central portion toward a heel-side of the recreational board. Each rail comprises at least one deformation-enhancing feature for enhancing an ability of the rail to deform elastically relative to the board.

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1. A binding system for retaining a rider's foot atop a recreational board, the binding system comprising: a pair of rails locatable on opposing sides of a generally flattened foot-receiving surface for the rider's foot, each rail comprising a central portion mountable to the recreational board, a t

1. A binding system for retaining a rider's foot atop a recreational board, the binding system comprising: a pair of rails locatable on opposing sides of a generally flattened foot-receiving surface for the rider's foot, each rail comprising a central portion mountable to the recreational board, a toe-side leg which extends from the central portion toward a toe-side of the recreational board and a heel-side leg which extends from the central portion toward a heel-side of the recreational board, the heel-side and the toe-side located on transversely opposite sides of a longitudinal axis of the board; andeach rail comprising at least one deformation-enhancing feature for enhancing an ability of the rail to deform elastically relative to the board wherein, for at least one of the rails, the at least one deformation-enhancing feature comprises a heel-side deformation-enhancing feature located between the heel-side leg and the central portion for enhancing an ability of the heel-side leg to deform elastically relative to the central portion. 2. A binding system according to claim 1 wherein, for the at least one of the rails, the at least one deformation-enhancing feature comprises a toe-side deformation-enhancing feature located between the toe-side leg and the central portion for enhancing an ability of the toe-side leg to deform elastically relative to the central portion. 3. A binding system according to claim 1 wherein, for the at least one of the rails, the heel-side deformation-enhancing feature comprises a heel-side cut-away slot which extends inwardly from an edge of the at least one of the rails between the heel-side leg and the central portion. 4. A binding system according to claim 3 wherein the slot has an opening located at an end of the slot most proximate the edge of the at least one of the rails and wherein elastic deformation of the heel-side leg relative to the central portion comprises at least one of increasing a size of the opening and decreasing the size of the opening. 5. A binding system according to claim 4 wherein the slot is shaped to provide the opening at a lower edge of the at least one of the rails. 6. A binding system according to claim 1 wherein, for the at least one of the rails, the heel-side deformation-enhancing feature comprises a heel-side deformation member, the heel-side deformation member relatively more deformable than the heel-side leg and the central portion. 7. A binding system according to claim 6 wherein the heel-side deformation member is fabricated from a material that is relatively more deformable than the heel-side leg and the central portion. 8. A binding system according to claim 6 wherein the central portion and the heel-side leg each comprise a plurality of stiffening ribs and the heel-side deformation member comprises a lower density of stiffening ribs relative to the central portion and the heel-side leg. 9. A binding system for retaining a rider's foot atop a recreational board, the binding system comprising: a pair of rails locatable on opposing sides of a generally flattened foot-receiving surface for the rider's foot, each rail comprising a central portion mountable to the recreational board, a toe-side leg which extends from the central portion toward a toe-side of the recreational board and a heel-side leg which extends from the central portion toward a heel-side of the recreational board, the heel-side and the toe-side located on transversely opposite sides of a longitudinal axis of the board; andeach rail comprising at least one deformation-enhancing feature for enhancing an ability of the rail to deform elastically relative to the board wherein, for at least one of the rails, the at least one deformation-enhancing feature comprises a toe-side deformation-enhancing feature located between the toe-side leg and the central portion for enhancing an ability of the toe-side leg to deform elastically relative to the central portion. 10. A binding system according to claim 9 wherein, for the at least one of the rails, the toe-side deformation-enhancing feature comprises a toe-side cut-away slot which extends inwardly from an edge of the at least one of the rails between the toe-side leg and the central portion. 11. A binding system according to claim 10 wherein the slot has an opening located at an end of the slot most proximate the edge of the at least one of the rails and wherein elastic deformation of the toe-side leg relative to the central portion comprises at least one of increasing a size of the opening and decreasing the size of the opening. 12. A binding system according to claim 11 wherein the slot is shaped to provide the opening at a lower edge of the at least one of the rails. 13. A binding system according to claim 9 wherein, for the at least one of the rails, the toe-side deformation-enhancing feature comprises a toe-side deformation member, the toe-side deformation member relatively more deformable than the toe-side leg and the central portion. 14. A binding system according to claim 13 wherein the toe-side deformation member is fabricated from a material that is relatively more deformable than the toe-side leg and the central portion. 15. A binding system according to claim 13 wherein the central portion and the toe-side leg each comprise a plurality of stiffening ribs and the toe-side deformation member comprises a lower density of stiffening ribs relative to the central portion and the toe-side leg. 16. A binding system for retaining a rider's foot atop a recreational board, the binding system comprising: a pair of rails locatable on opposing sides of a generally flattened foot-receiving surface for the rider's foot, each rail comprising a central portion mountable to the recreational board, a toe-side leg which extends from the central portion toward a toe-side of the recreational board and a heel-side leg which extends from the central portion toward a heel-side of the recreational board, the heel-side and the toe-side located on transversely opposite sides of a longitudinal axis of the board; andeach rail comprising at least one deformation-enhancing feature for enhancing an ability of the rail to deform elastically relative to the board;wherein, for at least one of the rails, the at least one deformation-enhancing feature enhances an ability of at least one of the toe-side leg and the heel-side leg to deform elastically relative to the central portion and the at least one deformation-enhancing feature comprises the heel-side leg being relatively more deformable than the central portion; andwherein the central portion comprises a plurality of stiffening ribs and the heel-side leg comprises a lower density of stiffening ribs relative to the central portion, thereby making the heel-side leg relatively more deformable than the central portion. 17. A binding system for retaining a rider's foot atop a recreational board, the binding system comprising: a pair of rails locatable on opposing sides of a generally flattened foot-receiving surface for the rider's foot, each rail comprising a central portion mountable to the recreational board, a toe-side leg which extends from the central portion toward a toe-side of the recreational board and a heel-side leg which extends from the central portion toward a heel-side of the recreational board, the heel-side and the toe-side located on transversely opposite sides of a longitudinal axis of the board; andeach rail comprising at least one deformation-enhancing feature for enhancing an ability of the rail to deform elastically relative to the board;wherein, for at least one of the rails, the at least one deformation-enhancing feature enhances an ability of at least one of the toe-side leg and the heel-side leg to deform elastically relative to the central portion and the at least one deformation-enhancing feature comprises the heel-side leg being relatively more deformable than the central portion; andwherein the heel-side leg is fabricated from a material that is relatively more deformable than the central portion. 18. A binding system for retaining a rider's foot atop a recreational board, the binding system comprising: a base mountable to the recreational board, the base comprising a front stand-off flange located forwardly of a generally flattened foot-receiving surface for receiving a rider's foot and a rear stand-off flange located rearwardly of the foot-receiving surface; anda foot retainer for retaining the rider's foot in generally fixed relation thereto, the foot-retainer comprising a front rail located forwardly of the foot-receiving surface and connected to the front stand-off flange at one or more front connections and a rear rail located rearwardly of the foot-receiving surface and connected to the rear stand-off flange at one or more rear connections;wherein one of:(a) the front rail is relatively more deformable than the front stand-off flange and the rear rail is relatively more deformable than the rear stand-off flange for motion of the rider's foot relative to the recreational board by deformation of one or both of the front and rear rails; and(b) the front standoff flange is relatively more deformable than the front rail and the rear stand-off flange is relatively more deformable than the rear rail for motion of the rider's foot relative to the recreational board by deformation of one or both of the front and rear stand-off flanges;wherein, each of the one or more front connections comprises a shaft that extends between the front rail and the front stand-off flange through a bore of one or more deformable bushings, the one or more deformable bushings more deformable than both the front stand-off flange and the front rail and wherein motion of the rider's foot relative to the recreational board is associated with corresponding movement of the shaft. 19. A binding system for retaining a rider's foot atop a recreational board, the binding system comprising: a base rigidly mountable to the recreational board, the base comprising a front stand-off flange located forwardly of a generally flattened foot-receiving surface for receiving a rider's foot thereupon and a rear stand-off flange located rearwardly of the foot-receiving surface; anda foot-retainer for retaining the rider's foot in generally fixed relation thereto, the foot-retainer comprising a front rail located forwardly of the foot-receiving surface and moveably coupled to the front stand-off flange at a front movement joint and a rear rail located rearwardly of the foot-receiving surface and moveably coupled to the rear stand-off flange at a rear movement joint;wherein the base and foot-retainer are shaped to retain the rider's foot on the foot-receiving surface such that the toes of the rider's foot are on a toe-side of a longitudinal axis of the board and the heel of the rider's foot are on a heel-side of the longitudinal axis, the heel-side and toe-side transversely opposing one another;wherein the front movement joint and the rear movement joint facilitate motion of the foot-retainer and the rider's foot relative to the base and the recreational board. 20. A binding system according to claim 19 wherein the front movement joint and the rear movement joint are upwardly spaced apart from the foot-receiving surface. 21. A binding system according to claim 19 wherein the front movement joint and the rear movement joint respectively comprise front and rear pivot joints which facilitate pivot motion about a pivot axis located in a pivot plane, the pivot plate generally parallel to and spaced upwardly apart from the foot-receiving surface. 22. A binding system for retaining a rider's foot atop a recreational board, the binding system comprising: a pair of rails locatable on opposing sides of a generally flattened foot-receiving surface for the rider's foot, each rail comprising a central portion mountable to the recreational board, a toe-side leg which extends from the central portion toward a toe-side of the recreational board and a heel-side leg which extends from the central portion toward a heel-side of the recreational board, the heel-side and the toe-side located on transversely opposite sides of a longitudinal axis of the board; andeach rail comprising at least one deformation-enhancing feature for enhancing an ability of the rail to deform elastically relative to the board;wherein, for at least one of the rails, the at least one deformation-enhancing feature enhances an ability of at least one of the toe-side leg and the heel-side leg to deform elastically relative to the central portion and the at least one deformation-enhancing feature comprises the toe-side leg being relatively more deformable than the central portion; andwherein the central portion comprises a plurality of stiffening ribs and the toe-side leg comprises a lower density of stiffening ribs relative to the central portion, thereby making the toe-side leg relatively more deformable than the central portion. 23. A binding system for retaining a rider's foot atop a recreational board, the binding system comprising: a pair of rails locatable on opposing sides of a generally flattened foot-receiving surface for the rider's foot, each rail comprising a central portion mountable to the recreational board, a toe-side leg which extends from the central portion toward a toe-side of the recreational board and a heel-side leg which extends from the central portion toward a heel-side of the recreational board, the heel-side and the toe-side located on transversely opposite sides of a longitudinal axis of the board; andeach rail comprising at least one deformation-enhancing feature for enhancing an ability of the rail to deform elastically relative to the board;wherein, for at least one of the rails, the at least one deformation-enhancing feature enhances an ability of at least one of the toe-side leg and the heel-side leg to deform elastically relative to the central portion and the at least one deformation-enhancing feature comprises the toe-side leg being relatively more deformable than the central portion; andwherein the toe-side leg is fabricated from a material that is relatively more deformable than the central portion.