EXPANDER FOR HANDS AVAN N20-12 Russian patent published in 2012 - IPC A63B23/16 

FIELD: sports.

SUBSTANCE: invention relates to a gymnastic inventory, and is intended, in particular, to train fingers and a wrist. The proposed device comprises a housing in the form of a ring, inside which a rectangular frame is located, which is connected to the ring by elastic elements, and inside of the frame in the center to the entire height a handle is installed, and the rectangular frame is made in the form of a rectangle, and the elastic elements are made of a spring or rubber. The result is achieved due to rotational motions of the hand, grasping the handle, which is located in the center of the rectangular frame, which enables in the process of training to use simultaneously the muscles of forearm and fingers.

EFFECT: improved efficiency of training.