From the moment you begin the back swing movement, the left arm in the controlling factor of the rotational movement of the upper body unit, the right
hand/right arm assumes control over the golf club so that it achieves
the correct position at the top of the back swing movement but
in addition, during the back swing movement the right arm must
remain tucked against the waist for as long as possible.
As the upper body unit is forced to rotate into the down swing
movement you must continue to keep the right elbow tucked into
the waist whilst also concentrating on the right wrist to hold
the golf club in the lagged position for as long as possible -
until just before the hands return to the original address position.
At that point the right wrist, working in conjunction
of the rotational movement of the upper body unit, delays the uncocking of the wrist in order to accelerate
the club head into the back of the ball.
(By keeping the right arm against the waist the club face will
return to the ball square to the target line.)
At the precise moment of impact, the left arm pulls the club head through the contact area whilst
simultaneously the right arm is forced into the fully straightened
position until both
arms are fully extended.
(As the club head strikes the ball
it is moving at a high velocity and therefore it will quickly
move ahead of the hands.
Therefore the key to a correct follow through movement is to ensure
that as soon as the the club head, the hands and the right shoulder
assume a straight line, the upper body is frozen in this position,
thus maintaining the alignment of the club head, the hands and
the right shoulder as the follow through movement continues.
But importantly, this alignment of
the club head, the hands and the right shoulder must be maintained
until the left arm is forced to fold.)