Thanks Yoda. How about the other questions? Maybe I need the definition of what a "preselected Downstroke Clubshaft Plane" is exactly before I'll get a grasp of that quote.
Here is another one for you. How can you have the rear shoulder and rear forearm be on the same plane angle without having a straight rear arm
I am not green but here goes.
In math, there are two absolute angles, meaning that it either is or it is not. These two are the horizontal and vertical planes. They either are horizontal / vertical or they are not.
However, because golf is played at an angle in between these two planes, there are an infinite number of angles that one may choose to play golf on.
Mr Kelly identified 5 of these inclined angles and they are catalogued in 10-6 of the book. Yes, there are an infinite number of angles on an incline plane, but there are only 5 that can be readily identified in relation to some body part (elbow, hands and shoulders), thus the 5 codified plane angles.
Elbow Plane
Squared Shoulder Plane
Turned Shoulder Plane
Turning Shoulder Plane and
Hands only Plane.
"preselected Downstroke Clubshaft Plane" simply means the clubshaft on which the player wants to utilise on the downstroke.
Please read 10-7 for an exposition of plane shifts.
Anyone of the 5 can be used or anyone of the infinite angles can be used.
Personally, I use the Turned Shoulder Plane because as Mr. Kelly says, any plane shift is hazardous. Nonetheless, for physical and psychological reasons, plane shifts can and are utilised.
The "rear shoulder" and "rear forearm" can be in a straight line (with the clubshaft) if one bends the right ("rear) elbow in towards the right hip. It will appear in a straight line if viewed from a "down-the-line" perspective.
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