| 摘要 |
The invention relates to a controllable load apparatus for use in machines for resistive exercise training of the human body. The apparatus comprises a pneumatic cylinder ( 10 ) having a piston ( 12 ) acting on a fluid and a piston rod ( 14 ), the piston/cylinder unit ( 10, 12 ) being operated on by a person undergoing training. A pressure accumulator ( 20 ) is connected to, and pressurizes the piston/cylinder unit ( 10, 12 ) at a predetermined pressure during exercise via a pneumatic control circuit ( 42 ). Once a predetermined pressure threshold is reached, a valve means operates to prevent further fluid being available for charging the accumulator ( 20 ).
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