Plyometric exercise platform

作者: Raymond N. Belli

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摘要: A platform for plyometric (jumping) exercises includes two horizontal platforms or steps of individually adjustable height. The are adjustably attached to a pair uprights which extend upward from base. parallel, about five feet long and one half apart. formed square section steel tubing. include brackets slide on the tubing lock into various height positions by means pins passed through holes in brackets. user may jump onto off steps, stand them exercise while holding handles also attach with pins.

参考文章(4)
Yeh H. Fu, Leg exercising system ,(1988)
Daniel Ross Mojden, Adjustable exercise apparatus ,(1984)