10-18-A Standard Wrist Action & 10-18-C Single Wrist Action

[Yoda]

... the Right Forearm Pickup should be accompanied by a turn of the left wrist.
There is also a slight FANNING motion of the right forearm as it is moving up
THE TURNED SHOULDER PLANE.

Lagster is correct here, and he makes a huge point.


With Swinging, the Left Wrist Turn-On-Plane can be almost immediate
(Standard Action per 10-18-A). With Hitting, it is the product of the
Body Turn and the Arm Swing and is more gradual (Single Action per
10-18-C-20). In both cases, the Left Wrist reaches the Top in an identical
alignment, i.e., Turned On Plane. As Lagster also points out, the Right
Forearm Fans as necessary in both Variations, enabling the Right Wrist Turn
(On Plane) to complement the Left Wrist Turn (On Plane). Thus, the Flying
Wedges Assembly (6-B-3-0-1) is maintained and with it, the 90 degree
relationship of its individual components.

[Yoda]

For Single Wrist Action, the left wrist cocks only. With Standard Wrist
Action, the left wrist cocks AND turns.

In Standard Wrist Action, the Left Wrist is physically Turned,
i.e., Rotated, by the player, ideally during Start Up. In Single Wrist
Action, the Left Wrist gradually Turns (via the natural Body and Arm
Rotation), but it is not Turned by the player.

[Yoda]

It's not possible for the left wrist to turn and roll and not the right,
unless you do something 'funny' with the right hand grip.

In an ideal world, MJ is right. Unfortunately, one man's 'funny' is another
man's 'habit.' And misaligned 'habit' executing its ignorance sabotages
performance.


Many otherwise correct Top positions are ruined by insufficient Right Wrist
Turn. Often, this condition can be traced to a perverted 'Position Golf'
attempt to maintain the Elbows 'close together' -- by actively pulling the
Right Elbow 'in' toward the Left -- throughout the Stroke. The cure is to
establish and maintain the correct Left Arm and Right Forearm (and Elbow)
Flying Wedge Alignments (6-B-3-0-1 and 12-3-0 #23).

[Yoda]

Yoda,

The left wrist "Turn" is a clockwise rotation of the left
forearm from the elbow down and changes the orientation of the hand and
forearm to the upper arm. This doesn't happen in Single Wrist Action unless
actively and intentionally done by the player, and at that time becomes
Standard Wrist Action.


[Bold by Yoda.]

We are in complete agreement. The key word is Rotation. With Standard
Wrist Action, the player actively Turns -- Rotates -- the Left Wrist On Plane
during Start Up. With Single Wrist Action, the Left Wrist gradually Turns
(with the Turning Body and Orbiting Arm) throughout the Backstroke and
reaches the Top in its Fully Turned (On Plane) condition. At no time is there
an independent Wrist Rotation by the player.