However due to the 3 dimensional nature of the plane, it would indeed be both 'back' and 'in' - on plane. Just 'in' would be too flat. Just 'back' would be too steep.
__________________
"Support the On Plane Swinging Force in Balance"
"we have no friends, we have no enemies, we have only teachers"
Simplicity buffs, see 5-0, 1-L, 2-0 A and B 10-2-B, 4-D, 6B-1D, 6-B-3-0-1, 6-C-1, 6-E-2
If the shoulders are square, parallel to both the target line and the surface of the "disc" that represents the inclined plane, then back, in and up, would be the most appropriate terminology.
These terms may seem BASIC, but they could be ADVANCED!
FORWARD
BACKWARD(BACK)
IN
OUT
UP
DOWN
"KEEP THE RIGHT SHOULDER BACK." If the player has not thought much about this term(BACK), he might actually be trying to keep the shoulder IN.
Let's discuss this one, and maybe think of some other examples.
"Sustain the lag" to "KEEP THE RIGHT SHOULDER BACK".
__________________ Yani Tseng, Go! Go! Go! Yani Tseng Did It Again! YOU load and sustain the "LAG", during which the "LAW" releases it, ideally beyond impact.
"Sustain (Yang/陽) the lag (Yin/陰)" is "the unification of Ying and Yang" (陰陽合一).
The "LAW" creates the "effect", which is the "motion" or "feel", with the "cause", which is the "intent" or "command".
"Lag" is the secret of golf, passion is the secret of life.
Think as a golfer, execute like a robot.
Rotate, twist, spin, turn. Bend the shaft.
These terms may seem BASIC, but they could be ADVANCED!
FORWARD
BACKWARD(BACK)
IN
OUT
UP
DOWN
"KEEP THE RIGHT SHOULDER BACK." If the player has not thought much about this term(BACK), he might actually be trying to keep the shoulder IN.
Let's discuss this one, and maybe think of some other examples.
Keeping the right shoulder back in reference to the downstroke is control of the power package element .Keeping the shoulder down(on plane)is essential,as the arms will always seek to follow the plane of the shoulder turn so that the power package can be delivered "on plane".It is interesting to note that Mr Kelly never(that I am aware of)uses IN ,OUT,UP or FORWARD in reference to the shoulder turn.He refers instead to turn or rotation in the backstroke and only"back " "down" and "rotated"in the downstroke.If you think about this(IMHO),the use of these words in this context suggests LAG.What a genius Homer was .BTW this post could have been shortened to ;bts's SUSTAIN THE LAG but I thought the above was interesting
.BTW this post could have been shortened to ;bts's SUSTAIN THE LAG
but I thought the above was interesting 
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