Abstract: A combined exercise apparatus has a frame, a structure for locating at least one knee of a user relative to the frame when the user is in either a sitting or a standing position, and a mechanism for engaging and resisting pivotal movement of the lower leg of the user. The engaging and resisting means includes at least one pivot arm engageable with the lower leg of the user and suspended for pivotal movement about a machine axis parallel to the joint axis of the knee, the location of the machine axis being adjustable to substantially coincide with the joint axis of the user's knee when the user is in either the sitting or the standing position.

Abstract: A pair of adaptors each has a tubular structure mountable to a gripping portion of a press bar for rotation between substantially opposite conditions. The adaptors are provided with opposed structures for engaging a user's shoulders and the bottoms of a user's feet, respectively, to perform distinct exercises in the two conditions. Rotational motion of the tubular structures permits a preselected limited range of movement of the adaptors so as to shoulder engaging portions of the adaptors to engage the shoulders of a user when in one position of rotation and to engage the feet of a user when in another position of rotation.