Patent ID: 6971976

Claim:
An exercise apparatus comprising: a generally rectangular frame having a pair of end members and a pair of spaced apart parallel side rail members forming part of said frame, wherein each said rail member and each said end member is comprised of an extrusion having a top wall, a bottom wall, an outer vertical rib spacing the top wall from the bottom wall, an outer screw race opening inward from said outer rib and extending longitudinally along said outer rib, and a carriage support channel formed between said top wall, said bottom wall, and said vertical rib; a moveable carriage mounted on said frame for movement along said rail members between said end members, said carriage having a generally flat upper surface, a pair of spaced shoulder stops mounted to said upper surface of said carriage and a plurality of support/guide wheel assemblies mounted to an underside of said carriage, each of said wheel assemblies including a support roller mounted for rotation about a horizontal axis, each said support roller being carried within said support channel of one of said rail members.