| 摘要 |
A system of the type having a ball connected to a bat by an elastic strip, has in one version a bat formed of polystyrene foam with a plug frictionally held in a hole through the bat face from front to back around which any surplus elastic-strip is wound to provide an adjustable length of elastic strip. The plug has a flat end and a contoured end, either of which can be axially adjusted when installed at the front face of the bat to vary the contour against which the ball impacts when batted. Relative silence in batting the ball results from the use of plastic foam material and from handle-free contour, making it necessary to grip around edges and back of bat with spread fingers, this local support tending to muffle vibration and sound. This gripping of the edges of the bat also provides training in muscular action like that needed in dribbling basketball.
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