| 摘要 |
An exercising device for strengthening the muscles used in pitching or throwing a baseball or softball or swinging a baseball or softball bat. In a preferred embodiment the exercising device is characterized by a base and a vertical support post upward-standing from the base. A pulley housing is provided on the support post and a pulley and an eccentric cam wheel are rotatably mounted in the housing. A cam tensioning device is provided on the rear of the housing for exerting a preselected torsional resistance on the cam wheel and a torque cable connects the pulley and cam wheel, such that the cam wheel rotates with the pulley. A pull cable trained on the pulley extends through an opening provided in the pulley housing and a baseball, softball or the impact end of a bat is removably attached to the extending end of the pull cable. As the baseball or softball is grasped and pulled away from the pulley housing in a simulated pitching or throwing motion or the baseball bat swung away from the housing in a simulated batting motion, the pull cable exerts tension on the baseball, softball or bat, exercising the muscles used in pitching or throwing a softball or baseball or swinging a bat. As the pull cable is retracted into the pulley housing after the simulated pitching, throwing or batting motion is completed, the baseball, softball or bat returns to the original position and the motion is repeated.
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