| 摘要 |
<p>A wrist rotation controller for a bowler is attached to the arm and thumb of the bowler to restrict or enhance wrist rotation during release of a bowling ball. The controller includes an adjustable band adapted to extend around the arm of the bowler at a position just below the elbow. An elongated non-stretchable strap has an upper end portion for removable and adjustable attachment to the band and a lower end portion having a non-stretchable loop for extending around the thumb of the bowler. When properly positioned on the arm and thumb of the bowler, the controller restricts or enhances rotation of the wrist and ball during release of the ball. The band and the strap have hook and loop fasteners commonly sold under the trademark VELCRO to provide the adjustment of the band on the arm and the strap on the band.</p> |
