Abstract: A portable universal gym is compact and easily stowed in a portable case. The framework is designed to breakdown into easily stowable components. When assembled, the framework may be secured to a stable device, such as, by way of example, the trailer hitch of a typical truck or similar vehicle, permitting the system to be used anywhere whether or not rigid and stable support members are available. The universal gym includes an integrated resistance training system. Various exercise implements may be used in connection with the universal gym system in order to increase versatility. These include but are not limited to: a basketball backboard and basket; a treadmill; an exercise bike; a punching bag; a bench for supporting bends, squats and dips.

Abstract: A weight plate system for a barbell or dumbbell includes a first plate adapted to be mounted directly on the bar of a barbell or dumbbell, with the plate having an outer perimeter spaced outwardly from the bar when mounted thereon. A second plate includes a center hole adapted for receiving the outer periphery of the first plate whereby the second plate is mounted in concentric relationship with the first plate. The center hole of the second plate defines an inner periphery of the second plate which is mated with the outer periphery of the first plate. The adjacent first and second plates have seating channels on the outer and inner periphery, respectively, for maintaining the plates in seated relationship. A locking system maintains the plates in the assembled relationship. Multiple plates can be mounted in concentric relationship in this manner.