| 摘要 |
The present invention relates to an improved baseball bat exercising device. The exercising device includes a sleeve that is designed to fit over a baseball bat, the sleeve having a spring-weight assembly thereon which moves longitudinally along the sleeve when the bat is swung. The inventive device also includes a metering system which indicates to a user the relative power expended when the baseball bat having the exercise device thereon is swung.
|
