Abstract: An exercise weight has an aperture extending therethrough which aperture is defined by an inner wall. The weight includes a locating flange extending inwardly of the inner wall. A resilient bushing of low-friction material is inserted into the aperture of the weight and is in slidably engageable with an elongate rod. The bushing has a peripheral wall and two locking flanges at the top and bottom of the peripheral wall which engage the locating flanges to preclude movement of the bushing relative to the weight in first and second opposing directions parallel to the longitudinal axis of the rod.

Abstract: The device relates to physical exercise apparatus providing variable resistance to the user has a weight stack movable along a vertical guide and a carriage movable along another guide, the guides being disposed at a predetermined angle to each other and the carriage and the weight stack being connected to each other through a rigid link. The carriage is movable by the user against a variable force dependent on the position of the weight stack in its guide, the angle between the guides and the weight of the stack.