A weight selector for use with a weight lifting machine having a plurality of weights to be lifted and an exertion element configured to exert force so as to lift a preselected amount of weight comprising: a first selector element configured to mechanically select a first amount of weight to be lifted; a second selector element configured to mechanically select a second amount of weight to be lifted, the second selector element being movable relative to the first selector element; and a distance limiting element configured to limit the distance between the first selector element and the second selector element.