Abstract: A variably flexible insert, or sets of inserts for an athletic shoe is provided which absorbs and distributes a portion of the user's weight. The insert is constructed of an injection molded plastic defining a plurality of horizontal slot or score lines which penetrate partially or completely through the insert. A series of perforations terminate the ends of the score lines which prevent or reduce cracking propagation of the score lines, and impart greater flexibility to portions of the insert. In one embodiment, the inserts are secured within the athletic shoe by adhesive pads. In another embodiment, foam friction pads are adhesively mounted or laminated on one or both sides of the flexible inserts, and this provides a non-skid surface within the running shoe and along the user's foot, as well as a certain amount of cushioning.