An exercise apparatus includes a frame configured to rest on a floor
surface; left and right cranks rotatably mounted on the frame; left and
right drive links having forward ends rotatably coupled to respective
cranks, and rearward ends constrained to move in reciprocal fashion
relative to the frame; left and right rocker links rotatably mounted on
the frame at a common pivot axis; left and right drawbar links rotatably
interconnected between respective rocker links and respective drive
links; and left and right foot links having forward ends rotatably
coupled to respective rocker links, and rearward, foot supporting ends
constrained to move in reciprocal fashion relative to respective drawbar
links or respective drive links. The resulting linkage assemblies
constrain the foot supporting ends to move through elliptical paths, and
the paths may be altered by adjusting various components of the linkage
assemblies relative to one another and/or the frame.