| 摘要 |
An exercise machine for wrist and forearm development includes a rod that is rotatable about its long axis and a cable having one end attached to the rod and the other end attached to a vertically guided weight stack. When the rod is rotated, the cable is wound upon it, against the pull of the resistance. The rod is attached to a stationary frame by a pair of parallel arms, one at each end of the rod. The arms are pivotally attached to the frame on a common axis. The height of the rod is adjusted by fixing the arms in a selected angular position about the common axis. A pulley is attached to the frame for rotation about the common axis. An intermediate portion of the cable passes over the pulley. Thus, adjustment of the height of the rod does not leave any slack in the cable.
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