also possesses probes measuring the rotational speed of the turntable and positioning the latter the brake can be controlled by a control device programmed for a particular exercise application_number US 90905686 A description with reference to fig1 and 2 the proprioceptive rehabilitation and or physical training apparatus 1 comprises a base 3 a turntable 5 and a brake 7 in the embodiment illustrated in fig2 the base 3 is inclined relative to the horizontal plane 9 the turntable 5 is provided with parallel grooves 11 having a profile in the form of an upturned t according to fig2 the brake 7 can be actuated manually by means of the handwheel 13 integral with the threaded rod 15 which compresses a spring the force of which lays blocks 17 against the axle of the turntable fig3 relates to another embodiment of the apparatus according to the invention which makes use of an electromagnetic brake 7 known per se the turntable 5 provided with its grooves 11 is fixed to its rotary shaft 21 by means of a flange 23 and screws 24 the said shaft 21 is seated rotatably in the base 3 by means of suitable conventional bearings 25 the electromagnetic brake integral with the base acts on the flange 23 in order to brake or even block the rotation of the latter and consequently that of the turntable 5 in a conventional way the electromagnetic brake 7 is concentric relative to the axis of rotation of the turntable 5 and is incorporated in the base being fastened to the latter by means of two rings 27 and 29 joined together on either side of the latter fig4 and 6 illustrate several uses of the.