Exercise machine

An exercise machine for use by an exerciser in a supine, seated or standing position, comprising:

• a mobile base having a forward end and a rear end;
• an upright support extending upwards from the mobile base;
• an upper support assembly extending in a generally forward direction from an upper portion of the upright support;
• an exercise device suspended from the upper support assembly at a location spaced from the upright support;
• and
• a counterbalancing system configured to urge the exercise device upwards and away from the exerciser;
• wherein the upper support assembly comprises a four bar pivot linkage and an actuator configured to control the four bar pivot linkage to adjust the height of the exercise device;
• wherein the four bar pivot linkage comprises a forward support from which the exercise device is suspended, at least one upper pivot link having a first pivot connection to the upright support and a second pivot connection to the forward support, and at least one lower pivot link having a third pivot connection to the upright support below the first pivot connection, and a fourth pivot connection to the forward support below the second pivot connection;
• wherein one of the pivot links has a rear portion extending rearward from the upright support and having a fifth pivot connection to a counterbalance arm of the counterbalancing system.