This is an exercise apparatus and system charactered generally by the presence of a user interface member haying a point of attachment to the apparatus that is posttionable at different locations along an arcuate path determined, dicated and/or supported/braced bv an arcuate guide The central axis of the arcuate oath mav intersect the ball joint of a user. The arcuate oath and the arcuate guide mav lie in spaced substantially parallel planes and the user interface member be one of a rigid arm with a handio or forearm interface, or a flexible member with a froo handle at its end forming the user interface. A flexible linkage forms pan of the operative connection betwoen the user interface and a weight stack or other apparatus providing adjustable resistance, with the flexible linkage being reeved through a centering cuiley proximate the central axis of the arcuate member.