Abstract: A rubber shock absorber, comprising a shock absorbing device body. The shock absorbing device body is made of elastic material, mounted in a shock absorbing device and absorbs pressure to which said shock absorbing device is exposed. The shock absorbing device body consisting of a plurality of sections with different diameters and different elastic coefficients. Peripheral grooves are cut into the shock absorbing device body at interfaces between the sections thereof. The shock absorbing device body has an elastic coefficient that varies in several stages, so that during an absorption process stages of different absorption characteristics are gone through.

Abstract: The present invention relates to an abdomen training device, comprising: a base frame, carrying a positioning frame, with a support being mounted on the positioning frame; and an abdomen training element, mounted on the support and further comprising an accommodating part, a spring, inserted into the accommodating part close to the front end thereof, a gliding bar, inserted into the accommodating part, the front end of the gliding bar leaning against the rear end of the spring, the rear end of the gliding bar extending beyond the rear end of the accommodating part, the gliding bar gliding inside the accommodating part along the longitudinal axis, and a rest plate, attached to the rear end of the gliding bar, having a rear surface, which is pressed against by the abdomen of a user; wherein during an exercise the user, contracting her or his abdominal muscles, pushes the rest plate and the gliding bar towards the front end of the abdomen training element against an elastic force caused by the spring and subsequ

Abstract: The present invention relates to a hip training device, comprising: a base frame, mounted on a horizontal floor; a positioning system, mounted on the base frame; a disc, rotatably supported by the positioning system; and a transmission system, further comprising a vertical bar, eccentrically and rotatably connected to the disc, a horizontal bar, having a front end and a rear end, the front end being attached to the vertical bar, and a rest plate, attached to the rear end of the horizontal bar and pressed against by the abdomen of a user, and having a strap to bind the user to the rest plate; wherein the user during an exercise moves the transmission system with her or his hips, causing a rotational movement of the disc, the disc in turn constraining the transmission system to a circular movement, taking along the user's hips with a training effect for the user's hips.

Abstract: A multifunctional training machine, that includes: a frame; a device for bending the user's body upward from a lying position, a seat, mounted on the frame a back rest, hingedly mounted on the seat and being raisable and lowerable, a gliding frame, glidingly mounted on the frame in front of the seat and movable back and forth and having two foot rests, and a transmission mechanism, connected to the gliding frame and the back rest and transforming the longitudinal movement of the gliding frame into raising or lowering of the back rest; a hip support for stretching the hips of the user, mounted between the seat and the back rest, close to the back edge of the seat, the hip support being vertically movable, so as to raise the hips of the user above the seat; and a pull bar, connected to the foot rests, for pulling up the foot rests, while the user presses in a contrary effort the feet on the foot rests; wherein the user can perform the exercises of bending the body upward from a lying position, stretching the hi