Trainer and/or sports device to improve jumping strength of foot and/or leg comprises plate and spring accumulator to store and then release impact energy of heel on ground

摘要

The device comprises a base plate (1), connected via a parallelogram unit (3,4) to a high boot, and of a spring unit (9). The impact energy of the base plate heel section (1a) is stored in the elastic spring unit, which remains locked during the natural rolling motion of the foot. When this motion is almost complete, a trigger (14) is operated, which causes the spring to release and to enforce the push-off movement of foot responsive base plate ball section (1b) off the ground.