A bodybuilding apparatus (2) includes a profile (100) provided with a coupling course (100A) in which a weight element (1) is selectively slidable along its length, the coupling course (100A) of the profile (100) being directly pivotable by a user in relation to any point of the bodybuilding apparatus (2) for the performance of an exercise. The disclosure also relates to a weight adjustment device (1), a bodybuilding apparatus (2) provided with a weight adjustment device (1), a method for adjusting weight on a bodybuilding apparatus (2), and a weight adjustment ring (90) for use in a weight element (1).

A machine for exercising various shoulder muscles. The machine includes a plurality of structural elements having a main vertical beam, a cross beam and a base frame operable to be positioned on the ground, where the main beam extends vertically from the base frame and the cross beam is mounted to and extends perpendicular to the vertical beam. The machine further includes a support cup coupled to the main vertical beam, a pulley mounted to the cross beam, a cable extending through the pulley, a handle coupled to an end of the cable, and a seat mounted to the vertical beam. The configuration and orientation of the structural elements, pulleys, cables and handles allow a user seated in the seat to position the user's arm in the support cup and pull on the handle to exercise the user's shoulder muscles.