A weight exercise machine may include an exercise member, one or more weights, and one or more weight selectors. When using the machine to exercise, the user exerts an exercise force against the exercise member. A weight selector may be rotated, pivoted, or otherwise moved to operably couple the exercise member to at least one of the weights such that displacement of the exercise member causes at least one of the weights to displace, thus providing resistance to displacement of the exercise member. The weights may include main weights and add-on weights for operative coupling to the exercise member via a movable frame. The one or more weight selectors allow for selection of different combinations of weights for providing resistance to displacement of the exercise member.