转胯和转肩的秘密
2009-03-31 21:42阅读:
Hip and Shoulder Myths 
by Jack Kuykendall
The movement and function of the hips
and shoulders in the golf stroke is one of the most misunderstood
actions in golf. Every golf article that I have read about the hips
and shoulders states that the hips rotate through 45 degrees and
the shoulders rotate through 90 degrees in the
backstroke.
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This is one of the best cases in golf literature of a statement
being made, and no one making a very sim |
ple scientific observation to see whether it is true. Two complete
system have been developed and promoted on this false assumption.
They are the X-Factor by Jim McLean and the Triple Coil by Dr.
Michael O'Leary and Milt Wallace.
The X-Factor states that the more you
can rotate the right shoulder to the right hip, the greater the
club head speed that can be produced. They make the statement that
John Daly can rotate his right shoulder 48 degrees past his right
hip in the backstroke. Medical literature shows that approximately
30 degrees is the maximum a human can rotate his right shoulder to
his right hip. This is 18 degrees more than humanly
possible.
The triple coil wants you to rotate
your hips as little as possible and your shoulders a
maximum.
Both systems want you to uncoil the
lower body (hips) against the upper body (shoulders). Previous
articles in this series has shown that club head speed comes from
arm speed. Torquing of the hips to the shoulders produces back
pain, not club head speed.
A simple scientific observation of the
hips and shoulders during a golf stroke reveals that the shoulders
work independent of each other. Stand erect and without moving the
right shoulder, place your left hand on your right shoulder. You
will notice that the left shoulder moved forward through about 45
degrees. To repeat, the shoulders move independent of each
other.
The following is the actual movement of
the hips and shoulders in an optimum golf stroke.
Address:
At address both shoulders rotate
forward between 30 and 45 degrees and the hips should be parallel
to the target line.
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Backstroke:
When you take a backstroke, the hips should rotate around 45
degrees. The right shoulder will rotate back to and in some cases
slightly past the right hip. In John Daly's case he lifts his arms
upward and this give the appearance of more rotation. However,
examination of the movement shows that the right shoulder is still
only slightly rotated past the right hip. Because the shoulders
work independent of each other, the left shoulder rotates an
additional 45 degrees toward the right shoulder. This can give the
illusion or false appearance of the 90 degree rotation that others
see. |
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Impact: An optimum downstroke is initiated
with the right hand moving away from the right shoulder. This
causes the shoulders and hips to be in the impact position
shown.
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Moe Norman, The World's Greatest Ball Striker, is in this position
at impact. Tom Lehman and Greg Norman are also very close to this
position.
Golfers who have learned to rotate their lower body independent of
the upper body (Tiger Woods and Jim Furyk) can still generate high
club head speed in spite of their hip action. They have simply
learned to hit the ball standing on their left foot - much like
trick shot artist. Both Tiger Woods and Jim Furyk have great arm
speed in spite of their lower body rotation.
Since Tiger Woods does not coil his shoulders to his hips and is
one of the longest hitter on tour, he is a good example of correct
upper body motion. Tiger's shoulders will follow the shoulder
motion of the above model, even those his hips will be more rotated
at impact.