Abstract: An apparatus for exercising an individual's muscles, including a hollow housing having a central hollow cylindrical section and a flange at one end of said cylindrical section. The flange end of the housing is mounted to a wall and an elbow joint permits the housing to be pivoted with respect to said wall. The side of the housing opposite the flange is provided with a support surface. An airtight disc or piston is movably positioned within said cylindrical section and is movable along a longitudinal axis of said cylindrical section. A rod extends from the center of a piston through said support surface and terminates in a handle. A cover plate which faces said support surface is removably attached to said rod; and a series of replaceable suction cup are fastened onto said cover plate which faces said support surface.

Abstract: The invention relates to a sports mat, especially a judo mat, of an elastic foam-like material (4) and possibly a sheath (7). According to the invention, the elastic foam-like material (4) is arranged on a stiff approximately circular plate (3) which has a central projection (5) on the underside and is fitted so as to "float" on a yielding foam (6).

Abstract: A training device for use in the sport of judo has a circular bottom surface curving upwardly, and a top part tapering inwardly and upwardly. The training device consists of an elastic material and it is symmetrical about its axis. In particular, the curvature of the flat part and the resulting line of the tapered top part are adapted to the anatomy of the foot, in particular, to the length of the foot and the shape of the instep. This device simplifies the practice of ASHI-WAZA.