| 摘要 |
A tethered exercise device for developing muscle tone and coordination in the wrist, arm and shoulder. The device has a handle connected by swivel means to an elongate strap. A ball is mounted on the strap by threading an end portion of the strap through a plurality of displaced slit openings in the wall of the ball for reciprocal movement thereon and adapted to be whirled about at any position on the strap.
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