Abstract: A conditioning and exercising device which is characterized in a preferred embodiment by a rewind housing containing a rotatable pulley provided with a pull cord, which rewind housing is connected to a torsion spring or spool housing. The rotatable pulley is connected to a rotatable top spool connected to a torsion spring wound on a rotatably mounted bottom spool, also connected to the torsion spring, both spools of which are located in the spool housing. Accordingly, extension of the pull cord and rotation of the rewind housing pulley against the tension in the torsion spring wound on the bottom spool as the torsion spring reverse-winds on the top spool, facilitates an increasing tension in the pull cord. In another embodiment the pull cord is wound directly on the rotatable top spool and is unwound against the tension in the torsion spring as the torsion spring reverse-winds from the bottom spool onto the top spool.

Abstract: 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.

Abstract: A pitching and batting conditioning device which is characterized in a first preferred embodiment by single and multiple drum conditioning devices having a drum spool for receiving a weight line attached to a weight and one or more drums of the same or different diameters for receiving a conditioning line or lines attached to a baseball bat or ball. Conditioning of the arm or arms and upper body is achieved by grasping the bat or ball and swinging the bat or simulating throwing the ball against the resistance of the weight. In another embodiment a multiple spring conditioning device also includes a conditioning line attached to a bat or ball and an adjustable feature for engaging springs of varying tension for application to the conditioning line. In a third embodiment a torsion spring is mounted in a housing with an adjustable torsional feature and includes a drum, upon which is wound a conditioning line attached to a bat or ball.