Abstract: A muscle strengthening apparatus comprising a feet securing member for securing the feet of a user, a support member for contacting the buttocks of the user, and a resilient member attached between the feet securing member and the support member. The resilient member comprises a first portion and a second portion wherein the first and second portions are angulated with respect to each other. The first and second portions each have an end opposite the point of contiguity of the first and second portions. The feet securing member is attached to the end of the first portion. The support member is attached to the end of the second portion. When the user's feet are secured by the feet securing member and the user's buttocks contacts the buttocks support member, the first and second portions of the resilient member are positioned generally posteriorly and/or medially with respect to the legs of the user.

Abstract: A clip board including a generally rectangular flat board for supportively receiving writing paper or the like thereatop and a pivotally movable paper clamp connected adjacent one end of the board and spaced above the board's writing surface. The paper clamp is pivotally interconnected to the board about a transverse axis parallel to the one end of the board by at least one downwardly extending retaining bracket which is inserted into a mating longitudinal slot in the board and pivotally held thusly by a transverse retainer pin. The retainer pin engages transversely through the lower end of the retaining bracket and extends in either direction beyond the width of the slot to engage against the bottom surface of the board adjacent the slot. A simple generally V-shaped spring acting in compression is positioned between the paper clamp and the board so as to pivotally bias the paper clamp against the board along the paper clamp's paper engaging edge which faces toward the central portion of the board.