Abstract: Apparatus for the practicing of gymnastics in the water without the linear movement of the user, including a frame, pedal mechanism, a system of transmission by means of a cascade of pinions, adjustable blades which allow a more or less great resistance of the water and a means of supporting the user either in a seated vertical position, for the exercising of his lower limbs, seat, handlebars or in a horizontal position, for the exercising of the upper limbs after modifications to the seat and the handlebars.