Abstract: A weight lifting exercise device is described. The device includes an upright standing main support frame formed of interconnected vertical and horizontal support members. A weight support carriage for detachably securing weight members is supported by the main frame for vertical movement with respect to the main frame. A cable is secured at one end to the carriage and is reeved around pulleys. A gripper bar is secured to the free end of the cable and is disposed to be grasped by a user for raising and lowering the weight support carriage. A resistance converter assembly is supported by the main frame and is secured to the weight support carriage to vary the force resistances on the carriage as the carriage is moved vertically.