Patent ID: 7591761

Claim:
A walking/jogging exercise machine comprising: a machine frame supported upon a generally horizontally extending floor; a shaft mounted for rotation on the machine frame; a pair of cams mounted for rotation on the shaft; a pair of movable track assemblies having rear portions with rear ends pivotally connected to the machine frame, and front portions with movable front ends; a pair of articulated cam follower assemblies having first ends pivotally mounted on the machine frame extending to and the front ends of the track assembly front portions, and including cam rollers operably engaged upon peripheries of the cams, the cam follower assemblies moving in response to rotation of the cams; a pair of foot assemblies mounted for sliding movement on the track assemblies; and a linkage arrangement between the cams and the foot assemblies for transferring movement of the foot assemblies to the cams such that the articulated cam follower assemblies enable a leveraged range of up and down movement of the track assemblies to produce an increase in bending of a user's knees resulting in an enhanced natural stepping motion during exercise.