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Inertia Effect.
(Changed -
29/05/2010)
During the back swing movement the the left shoulder pushes
the compact upper body unit 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, 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 still be
a an immediate lagging effect upon the arms.
This lagging effect is only minimal, but it has to be counteracted
before the club head strikes the ball, therefore it is the skill
of the golfer to control the swinging of the arms so that the club
head strikes the ball at the precise moment the shoulders are parallel
to the target line.
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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