An exercise apparatus includes left and right support members movably
connected to a frame, left and right force receiving members mounted on
respective support members for movement along the support members without
rotating relative to the support members, and left and right cranks
rotatably mounted on the frame and linked to respective support members
and respective force receiving members in a manner that constrains the
force receiving members to move through respective elliptical paths in
response to rotation of the cranks.