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Inertia Effect.
(Changed -
01/01/2011)
During the back swing movement, the left shoulder controls the
rotational movement of the compact upper body unit as it rotates
around the central core of the spine thus pushing the club head
away from the ball - therefore there is no inertia effect upon the
arms at all.
However because the arms are totally passive to the movement
of the shoulders and therefore regardless of how tightly the elbows
are held together, as soon as the shoulders begin to rotate into
the down swing movement the passive arms/golf club will immediately
begin to lag begin the rotational movement of the shoulders.
For example, as you begin to aggressively rotate the hips in
an anti-clockwise motion thus literally forcing the shoulders to
rotate around the central core of the spine, there will be a an
immediate lagging effect upon the arms.
Therefore it is the "inertia effect" which enables
the very good golfer to achieve the maximum velocity of the clubhead
as it moves through the contact area.
It is important to understand that as long as you keep the arms
passive to the movement of the shoulders, the "inertia effect"
will always be present.
Clubhead.
This "inertia effect" becomes even more important
when you apply the principle to the actual clubhead.
When you are using the shorter irons such as the pitching wedge
or the sand iron, the delay caused by the "inertia effect"
before the clubhead catches up with the hands at the impact position
is very small, so only a small adjustment is required in order to
correctly time the strike.
However as you start to use longer irons, such as the five
or six irons, the shafts also become longer, which means that due
to the "inertia effect", the delay time increases even
further before the clubhead can catch up with the hands at the impact
position.
Finally, when you are using the longest club, the driver, the
delay caused by the "inertia effect" will have increased
even further before the clubhead can catch up with the hands at
the impact position.
So it is very important when making the down swing, that as
the club shafts become longer, you must take into consideration
the "inertia effect" in order to compensate for the extended
time delay.
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