Abstract: Locomotion exercise enhancement equipment comprises a frame which is supported for rolling motion along ground by a pair of axled wheels. The user either pulls or pushes the frame. A rotary load is supported on the frame and operatively coupled with the axled wheels to cause resistance to be imposed on the rotation of the wheels. A selector control varies the degree of coupling of the wheels with the rotary load to thereby vary the effective load imposed on the wheels. Several embodiments of the locomotion exercise enhancement equipment are disclosed. In one of these embodiments the rotary load comprises a disk that is attached to a housing containing a differential mechanism; as the equipment is rolled, the wheels drive the differential mechanism, causing the housing and the disk to rotate. A caliper brake mechanism disposed in association with the disk is set by an adjustment mechanism to impart a desired force against opposite sides of the disk, and thereby set the desired loading.

Abstract: An exercise machine for performing supination and pronation exercises comprises a framework, a weight stack carriage that is supported on said frame work for vertical motion, and an input mechanism that is operably coupled by a cable and a system of sheaves on the framework to the weight stack carriage. The input mechanism comprises a horizontal shaft that has operating handles at opposite ends for rotating the shaft. A bi-cam is disposed on the shaft, and one end of the cable is tethered to a high point of the bi-cam. The bi-cam has respective cam profiles in its respective halves; one profile interacts with the cable when the shaft is rotated in one sense from a starting position, and the other profile interacts with the cable when the shaft is rotated in the opposite sense from the starting position.