(57) An elliptical exercise machine (100) includes two swing rods (2) connected pivotally
to a base (1), a flywheel (3), two supporting rods (4) connected pivotally between
the flywheel (3) and the swing rods (2), two pedal rods (5) slidable respectively
on the supporting rods (4), and a motion transmitting device (6). The device (6) includes
a fixed member (61) fixed on the base (1), a rotatable member (62) locked releaseably
on the fixed member (61) at a selected angular position, two cranks (63) connected
pivotally to the rotatable member (62), and two links (64) each having a first pivot
portion (641) connected pivotally to the corresponding pedal rod (5), a second pivot
portion (642) connected pivotally to the corresponding swing rod (2), and a third
pivot portion (643) connected pivotally to the corresponding crank (63) . The links
(64) are driven by the cranks (63) to move the pedal rods (5) forwardly and rearwardly
on the supporting rods (4), respectively.
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