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An exercise apparatus has a linkage assembly which links rotation of left and right cranks to generally elliptical movement of respective left and right force receiving members. The linkage assembly includes left and right flexible rocker links interconnected between the frame and respective force r

An exercise apparatus has a linkage assembly which links rotation of left and right cranks to generally elliptical movement of respective left and right force receiving members. The linkage assembly includes left and right flexible rocker links interconnected between the frame and respective force receiving members. Lateral supports may be provided in conjunction with the flexible rocker links to resist side loading on the force receiving members.

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1. An exercise apparatus, comprising: a frame designed to rest upon a floor surface; a left crank and a right crank, wherein each said crank is mounted on the frame and rotatable relative thereto about a common crank axis; a left foot support and a right foot support, wherein a first portion of

1. An exercise apparatus, comprising: a frame designed to rest upon a floor surface; a left crank and a right crank, wherein each said crank is mounted on the frame and rotatable relative thereto about a common crank axis; a left foot support and a right foot support, wherein a first portion of each said foot support is movably connected to a respective crank; a left guide and a right guide, wherein each said guide is flexible and supported by the frame, and a second portion of each foot support is supported by a respective guide; and a left rocker link and a right rocker link, wherein each said rocker link is rotatably mounted on the frame, and each said foot support is movably connected to a respective rocker link for movement along a respective rocker link. 2. The exercise apparatus of claim 1, wherein a third portion of each said foot support, disposed between a respective first portion and a respective second portion, is sized and configured to support a person's foot. 3. The exercise apparatus of claim 1, further comprising an adjusting means for adjusting each said guide relative to the frame. 4. The exercise apparatus of claim 1, wherein rotation of each said crank causes each said foot support to move through a substantially elliptical path. 5. The exercise apparatus of claim 1, wherein each said foot support is movable along a slot formed in a respective rocker link. 6. The exercise apparatus of claim 1, wherein an upper end of each said rocker link is sized and configured for grasping by a person standing on each said foot support. 7. An exercise apparatus, comprising: a frame designed to rest upon a floor surface; a left crank and a right crank, wherein each said crank is mounted on the frame and rotatable relative thereto about a common crank axis; a left foot support and a right foot support, wherein a first portion of each said foot support is movably connected to a respective crank; a left flexible guide means and a right flexible guide means, each supported by the frame, for supporting a second portion of a respective foot support; and a left lateral support means and a right lateral support means, each supported by the frame, for laterally supporting a respective foot support without guiding a respective foot support through any particular path. 8. The exercise apparatus of claim 7, further comprising an adjusting means for adjusting each said guide relative to the frame. 9. The exercise apparatus of claim 7, wherein each said support means includes a rocker link rotatably mounted on the frame at a common rocker axis. 10. The exercise apparatus of claim 9, wherein each said foot support is movable along a slot formed in a respective rocker link. 11. The exercise apparatus of claim 9, wherein an upper end of each said rocker link is sized and configured for grasping by a person standing on each said foot support. 12. The exercise apparatus of claim 7, wherein rotation of each said crank causes each said foot support to move through a substantially elliptical path. 13. The exercise apparatus of claim 7, wherein a third portion of each said foot support, disposed between a respective first portion and a respective second portion, is sized and configured to support a person's foot. 14. The exercise apparatus of claim 7, wherein each said support means includes a vertical bearing surface disposed adjacent the first portion of a respective foot support.