Abstract: An exercise apparatus. The apparatus includes first and second elongate support members pivotally mounted upon a support frame. First and second foot holders are moveably mounted upon the first and second support members, respectively, for supporting a user's feet thereon. The foot holders are moveable forwardly and backwardly along the support members. The combination of pivotal movement of the support members and linear movement of the foot holders relative to the support members enables the user to move each foot (i) simultaneously backwardly and downwardly and (ii) simultaneously forwardly and upwardly, in a reciprocating movement path without removing the feet from the foot holders.

Abstract: Foot treadle operated exercising apparatus of this invention provides for transfer of air from one foot treadle operated vertically disposed bellows to another through a restricted pathway adjustable in size by an adjustable valve to select a desired work load. A stroke length adjustment is featured for changing the length of the stroke. This is achieved with bellows that are biassed to return to an extended condition in the presence of atmospheric air. Thus with a closed air system, a manually operated air admission and venting valve will increase the bellows height when opened to admit atmospheric air and will decrease the bellows height when opened and pedals are depressed to vent air. The foot treadles are operable from a standing, sitting or lying position. An auxiliary arm exercise harness operates in conjunction with the foot operated treadles by means of hand manipulated lines cross connected so that the left hand will depress a right foot treadle and visa versa.