Because the left heel has remained fully the ground, as the back swing reaches its conclusion the whole body has been twisted to its maximum, the left shoulder is pointing to the ground and the right shoulder is pointing to the sky whilst the right elbow remains tightly tucked into the waist.
The object of the down swing movement is not just simply to use the rotation of the upper body to swing the arms into the contact area, but to use the rotational movement of the hips to force the upper body unit as a whole to rotate into the down swing movement, then when the ball is struck, you use your arms to swing the club head through the contact area.
(It is important to point out that you must keep the right elbow tucked into the waist throughout the down swing movement, until the club head strikes the ball.
This is not an easy task as first as the impulse is to activate the arms during the down swing movement, but persevere and you will reap the results, because by holding the right elbow tight into the waist until the club head strikes the ball it stops the arms from moving too early thus dramatically improving the accuracy of the shot.
Down Swing Movement.
Whilst holding the compact upper body in this twisted configuration, I press down with my left foot and simultaneously force the right hip to rotate towards the target area, whilst also simultaneously forcing the left hip to rotate away from the target area, thus ensuring that the hips rotate around an central axis whilst held firmly over the centre of your stance.
(This action is performed
whilst keeping my head positioned
so that the left eye remains slightly behind the
ball position, the left arm close to the right shoulder, the right elbow tucked into my waist and my eyes fully focused on the
back edge of the golf ball, but very aware that the bottom of the swing arc is about four inches in front of the ball.)
This hip action will create a tremendous pulling effect upon the passive compact upper body, but the upper body unit must be held back from following the movement of the hips for much longer than you can imagine, thus further increasing the torsion of the muscles between the lower body and the upper body and thereby increasing the twisting effect of the whole body.
This will literally force the upper body unit to follow the movement of the hips, but you must continue to hold the left arm close to the right shoulder and keep the right elbow tucked into the waist.
But importantly, the upper body must remain in a totally passive condition whilst the hips turn to fully face the target area.
(See video as an example of how the left arm remains close to the right shoulder and the right elbow remain close to the body until the impact position.)
When you understand the basic principles of the technique that I am teaching, have a look at the top professionals and you will see how the arms lag well behind the upper body unit and are totally passive as the hip movement forces the upper body unit to rotate during the down swing.
( I call the hips and the upper body as they rotate into the down swing / follow through, the Shoulder/Hips unit.)
From the moment the hips begin to rotate towards the target area, the rotational movement of the hips must continue to exert this pulling effect upon the upper body unit, so that eventually the upper body unit is rotating into the down swing movement, not because of any physical effort on your behalf but as a direct result of the hip rotation.
This action must continue throughout the remainder of the down swing and into the /follow through movement, thus eliminating the need to actually force the upper body unit to rotate.
However, importantly, I continue to hold the left arm close to the right shoulder, but equally important, I keep the right elbow tucked into the waist until the club head strikes the ball.
(It is absolutely vital that the right hip/left hip rotation causes the hips to physically begin to rotate to fully face the target area in an aggressive manner, the hips should be partially facing the target area well before the upper body unit has reached the halfway stage of the down swing movement.
See video of Jordan Spieth and notice how the hips rotate slight ahead of the rotational movement of the upper body unit.)
As the hips force the compact upper body unit to rotate into the down swing movement, the upper body angles must be maintained and because of this, from the very beginning of the down swing movement the universal joint theory must be applied and the golf club must return on a swing path that is a reflection of the back swing movement.
As the down swing movement is performed, you must keep your head behind the ball and also try to keep the left arm close to the right shoulder and the right elbow tucked into the waist until the club head strikes the ball, at that point the right arm is quickly fully extended.
( The longer you can keep the left arm close to the right shoulder, maintain the twisted condition of the whole body and hold the right elbow close to the waist, the better the contact and the accuracy of the shot.)
Throughout the down swing movement I am concentrating very hard to
keep my head firmly in the original address position and also in the frontal facing position whilst maintaining the upper body angles as the rotational movement of the hips force the upper body unit to rotate into the down swing movement, but importantly my eyes are fully focused on the back of the ball so that I can see the precise moment the club head strikes the ball, because at that point, the follow through begins where the arms interact thus forcing the club head through the contact area, whilst simultaneously completing the task of turning the whole body to fully face the target area ---- at the same speed the arms swing past the body
At impact the hips are almost completely facing the target area and the shoulders feel as if they are also facing the target area and the left shoulder is still close to the right shoulder, the right elbow remains tucked into the waist -- but this action can only be achieved by using the waist line as a universal joint.