11 c may be optionally provided for the two other drive shafts as well fig7 now shows a machine 1 u2032 composed of four devices 1 i e comprising a plurality of devices 1 of the kind described above such a machine 1 u2032 is especially well suited for use for four legged users because in that case each device 1 of the machine 1 u2032 can be adapted individually to the user 39 s leg that is to be trained and or analyzed one application of the described machine 1 u2032 may then again consist in teaching a horse the sequence of steps the horse has to run for a piaffe in that case it is provided that the device 1 a acting on the left hand foreleg and the device 1 c acting on the right hand hind leg move in phase so that the two devices 1 a and 1 c produce their minimum or maximum amplitude respectively at the same moment the device 1 b acting on the left hand hind leg and the device 1 d acting on the right hand foreleg then operate with a phase shift of 180 u00b0 from the above description it is clearly obvious to the man of the art that the intermediate plate 6 has the sole function to permit the vertical movement of the stepping plate 4 to be adjusted during the training treatment process when that advantageous effect is not desired or not.