BIOMECHANICS OF THE WRIST SHOT

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Term Paper Title	BIOMECHANICS OF THE WRIST SHOT
# of Words	1524
# of Pages (250 words per page double spaced)	6.1

BIOMECHANICS OF THE WRIST SHOT

WHEEL AND AXLE
     *Muscles causing a body part to rotate around an axis
     *In the floor hockey wrist shot the serrape affect is used to rotate the body around
       the spine which acts as a vertical axis.

PULLEY
     *Change in direction of a muscle providing leverage
     *The peroneus brevis and peroneus longus run down the fibula and change
       direction around the maleoli and attach in the metatarsal region.  This action
       causes plantar flexion when pushing off for the step.

LEVERS
     *Consist of a force, a resistance, and an axis.  The body contains mainly third
       class levers which are built for speed rather than power.
     *A first class lever comes into play in the left arm.  The arm is extended so the
       tricep is flexed.  The axis lies in between the force and resistance at the elbow.
       The force is in the olecraneon process, and the resistance lies in the hand where
       The stick is being held.
     *A second class lever comes into play during the step when the foot is pushing
       off the floor.  The resistance lies in between the axis and force in the foot.  The
       axis lies at the ball of the foot, and the force lies in the heel as the gastrocs are
       being flexed.
     *A third class lever comes into play with the hamstrings in the push and slide
       motion which provides slight knee flexion.  The axis is in knee joint, the force
       lies in between the axis and the resistance.  For this lever, the force is applied
       where the muscle attaches to the bone being moved, which in this case is the
       tibia.  The resistance runs from the point of attachment away from the axis.  In
       this case the resistance is the lower tibia and the foot.

SPEED vs. POWER
     *Class 3 levers are built for speed rather than power, therefore, the body is built
       for speed rather than power.
     *In this situation when the muscles are stretched they have more physiological
       advantage and when the muscles become contracted and shorter they have a
       higher mechanical advantage.

SHUNT vs. SPURT
     *Shunt is the fixation pulling against the joint and spurt is the rotation around the
       joint.
     *In this situation the right arm is at a 90 degree angle, therefore, shunt is zero and
       spurt is 90 degrees.

CENTER OF GRAVITY
     *The point where all of the body's weight is equally distributed around a point of
       intersection in the horizontal, lateral, and anterior posterior plane.
     *The center of gravity for the wrist shot is shifted forward because the ...

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