An exercise device includes a frame defining a longitudinal axis. A foot
link includes a rearward portion that is constrained to move in an
orbital path approximately parallel to the longitudinal axis and a
forward portion that reciprocally engages the guide track. A swing arm is
a pivotally connected to the frame, the swing arm having an upper portion
extending above the pivotal connection and a lower portion disposed below
the pivotal connection. An engagement mechanism having a first portion
coupled to the lower portion and a second portion coupled to the forward
portion of the foot link, such that a rearward force applied to the upper
portion will produce a force on the forward portion having a downward
component. An arm enabling/disabling mechanism is positioned on the
elongate swing arm below the pivotal connection. The arm
enabling/disabling mechanism can be effectuated by a user without the
user interrupting exercise.