| 摘要 |
A weight lifting machine is useful for developing muscles used in arm wrestling. The weight lifting machines comprises a carrier that rotates about an axis of rotation. Pivotable levers are connected to the carrier symmetrical about the axis of rotation. A cord hangs from each lever. The cords join into a single cord that holds a weight so as to produce equal and opposite torques on the carrier. A person exerts a force on the carrier sufficient to overcome one of the torques and thereby rotate the carrier. By pivoting the levers the cords hang at different distances from the carrier axis of rotation, thereby changing the amount of torque produced on the carrier by the weight and the amount of force the person must exert to rotate the carrier. A block on the carrier contacts the cord during carrier rotation in a manner that results in a smooth and continuous resistance by the weight on the person's arm.
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