In an apparatus for muscle stimulation with at least one motor and with two motor-operated drives, wherein each of these drives and a stepping plates are mounted in a frame and each of these drives is a revolving linkage square and the driven drive member is in each case a crank mounted in the frame, a crank and a stepping plate are in each case connected in an articulated manner by means of a coupling member providing for an apparatus for muscle stimulation with stepping plates that can be operated both with low and also with high stroke frequencies.