The invention is an apparatus for producing automatic flexion of a chiropractic table. The apparatus includes a motor driven cam mechanism and a linkage assembly coupling the cam mechanism to the anterior section of an articulated chiropractic treatment table, the apparatus producing a cyclical palpation flexion movement of the anterior section of the chiropractic treatment table in accordance with predetermined treatment procedures prescribed for the treatment of lumbar disc protrusions.

A shoulder press exercise apparatus is provided. The shoulder press apparatus includes a selectable weight mechanism and a support member which pivotably supports a pair of four-bar linkage mechanisms. The four-bar linkage mechanisms are pivotably mounted at their rearward ends about axes which are disposed at an angle relative to a horizontal plane, i.e. are tilted relative to vertical, such that a pair of elongated bars of the four-bar linkage mechanisms travel in planes which are tilted relative to vertical. The tilted planes through which the four-bar linkage mechanisms travel enable the handles to travel along a slightly curvilinear downwardly diverging path which simulates as natural a human musculoskeletal upward pushing motion as possible.

A pull down apparatus is provided. The pull down apparatus includes a selectable weight mechanism and a support member which pivotably supports a pair of four-bar linkage mechanisms. The four-bar linkage mechanisms are pivotably mounted at their rearward ends about axes which are disposed at an angle relative to a horizontal plane, i.e. are tilted relative to vertical, such that a pair of elongated bars of the four-bar linkage mechanisms travel in planes which are tilted relative to vertical. The tilted planes through which the four-bar linkage mechanisms travel enable the handles to travel along a slightly curvilinear downwardly diverging path which simulates as natural a human musculoskeletal upward pushing motion as possible.

An arm curl exercise apparatus is provided. The arm curl exercise apparatus includes a selectable weight mechanism and an inpact lever mechanisms operatively connected thereto. A pair of four bar linkage mechanisms are connected to the free end of the input lever. A pair of handles are rotationally connected to the forward most bar component of the four-bar linkage mechanisms such that the handles follow the same pivoting movement as the forward most bar component, when the four bar linkage mechanisms are pivoted. When utilizing the rotatably mounted handles the user is able to maintain the proper biomechanical alignment of the joints while choosing from a variety of grips. The paths through which the four-bar linkage mechanisms travel enable the handles to travel along a slightly curvilinear upwardly converging and downwardly diverging path which simulates as natural a human musculoskeletal arm curl motion as possible.

An incline press exercise apparatus is provided. The incline press apparatus includes a selectable weight mechanism and a support member which pivotably supports a pair of four-bar linkage mechanisms. The four-bar linkage mechanisms are pivotably mounted at their rearward ends about axes which are disposed at an angle relative to a horizontal plane, i.e. are tilted relative to vertical, such that a pair of elongated bars of the four-bar linkage mechanisms travel in planes which are tilted relative to vertical. The tilted planes through which the four-bar linkage mechanisms travel enable the handles to travel along a slightly curvilinear downwardly diverging path which simulates as natural a human musculoskeletal pushing motion as possible.