20 by means of the dovetail joint 24a b on their opposite facing sides 21c and 22c male and female elements 25a b of for example a velcro type joint can be provided or an equivalent reversible connection device the above embodiment of the equipment according to the invention makes it possible to carry out the exercises of dynamic flexion static flexion and gait on flat surfaces as will be described more clearly further on in fig4 and 5 a further embodiment of the equipment according to the present invention is shown in which body 1 of the equipment is hollow and in particular is formed by a substantially flat element 30 on one face of which footrest surface 2 is formed possibly shaped anatomically as well as by a curved plate element 31 substantially in the form of half of a cylindrical surface closed by said flat element 30 the cylindrical surface of element 31 is curved with the same profile as that of the embodiments described above it has in other words two surface portions 3a and 3b of different curvatures connected to one another in an area 4 located nearer to anterior end 2a of surface 2 element 30 rests on brackets 32 extending from the inner wall of element 31 and is connected to them.