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5.31.2013

Grip Force, Handle Size, Handle Shape

Handle size and handle shape leads to considerable differences in gripping force.  A small-handed athlete experiences large handles differently than a largehanded subject. This may not only be related to the inability to grasp the larger object as effectively, but if the object is too large the athlete actually can experience discomfort due to pulling on the sheaths of the fingers.  With an object that is too small a largehanded persons fingers feel undue stress as the object compresses into the tissue.

In general people prefer more contact surface area between handle and the hand in hook pulling tasks.  It is important to get the proper relationship between the applied external finger force and the tendon forces.  Grasping the Pendulum Gripper you immediately understand what is seemingly a difficult construct.  The goal in gripping is to maximize the contributions of the capabilities of each finger to the total grip force.  In looking at the general population the average contribution of each finger in a hook pulling gripping  task to the total force, from index to little finger, is  23–31%, 29–33%, 22–30%, and 14–22%, respectively for the four digits.  The Pendulum Power Grip Pro takes handle size into consideration to maximize hand strength to Get Strong.

Pendulum Gripper

Pendulum Gripper

Apple Physical Therapy Services Manchester, New Hampshire

http://www.youtube.com/watch?v=QIJIBD02BUg

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