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The forces of grasping with your hand's fingers is highly coordinated. All 5 fingers are linked in order to optimally balance the hand during a grip.  The thumb in grasping objects can be considered an additional actuator during a hook or crimping grip by exerting a supplementary force of approximately 17% in the same direction as the index, middle, ring and little fingers are pulling.  The central nervous system organizes the association of the hands 5 fingers and balances the force output of each digit based on how an object is held. Finger force 'sharing' can be totally re-organized simply by the position of the thumb during activity.

Using the Thumb to Modify Finger Force

In training the hands it is all-important that the various hand gripping positions are addressed. Getting each digit Strong can make a difference of how well you do in sport, recreational activities and many other aspects of daily living.

The Pendulum Grip Cart was designed to maximize strength by consigning implements for specific anatomical ways that objects are generally held.Pendulum Grip Cart

The Pendulum Grip Cart