保齡球出手法

Here the bowler is starting his slide. You can see the wrist is still in the cocked-cupped-finger spread position. The ball is beside his hip and no turn is taking place yet. A lot of bowlers start turning the ball here which robs them of revs.














































As the ball nears the heel of the slide foot the player starts to "turn the door knob". A bowler with a weaker wrist may have to start turning in the position of picture "G".



As you turn the ball the wrist starts to un-cup which allows the thumb to escape quickly
The red line indicates the axis of the ball. If the player keeps his wrist cocked like this the result will be a lot of axis tilt.



The ball reaches the toe of the slide foot. The wrist is completely un-cocked and un-cupped. The fingers just go straight up through the ball with little more than just the momentum of the arm swing. No extra jerking up to cause an under/over reaction. The red line showing the axis has moved to a position showing much less tilt than in picture "I".
Notice that from picture G - J the fingers only rotated around the side of the ball less than 4 inches. For a greater axis of rotation the fingers would have to rotate around the ball just a little more.