Hi Louis,
Both statics and processes are involved in order to move the body according to Tai Chi techniques.
Depending on which way one wants to turn the body (which depends on the direction of external force)one has to FILL one leg if it is not already full so as to TURN the torso so as to neutralize the external force.
Once the leg has been filled (process) it is full(static). Static in the sense of no longer being filled, of completed action and static in the sense of staying filled until time comes to empty it, to shift weight to the other leg.
Something (the leg, one side) is being filled by something (the weight of the upper body plus the weight of the other leg.
This is the weight shifting action which involves redistribution of body weight over the legs.
The second process is the TURNING OF THE TORSO through its range of movement when only one leg bears the weight of the torso.
(Turning and weight shifting require distinct skills, but turning depends on weight having been shifted)
This TURNING range of movement is substantially different in cases where both legs are supporting weight of the upper body versus when one leg is supporting the weight of the upper torso (as well as supporting the 'empty' leg).
The range is about 11 degrees when both legs bear weight, regardless of the ratio between the legs.
And about 90 degrees when one leg for the time of the torso turning ALSO supports the weight of the torso for that time of TURNING.
The 90 degrees maximum depends on initial foot placement, ie. initial internal/external rotation position of the pelvis on the femur.
Also, so as to avoid confusion, though leg filling and torso turning are distinct movements they can be co-ordinated so as to fill while turning, turn while filling.
This is due to the ability of the hips to turn on the femur while both legs are weight bearing, i.e. for about 11 degrees.
After that for the remaining 79 degrees the other leg needs to be empty of weight of the upper body so as to allow that 79 degrees turning of the hip on the femur of the weighted leg.
The leg that is not bearing weight of the body, that is 'empty' in that specific sense, does not need to be off the ground.
Even when it is flat the weight of that leg can be supported by the other leg via being attached to the upper body which is being supported by the other leg. This is where the metaphor about the scale comes in.
Once in that position a very slight lateral upper torso adjustment will reduce the contact of that empty leg's foot to just toe contact,or heel contact, or off the ground entirely so as to move the foot to a different place.
Your comments about the weight distribution in the form are important to keep in mind.
Weight distribution is not only important re turning of the torso but re controlling momentum of strikes as well as for executing weight shifts for applications, eg. push, slant flying.
Double weighting, as you have pointed out in a previous post, is a term that occurs in the context of neutralizing.
"Shuangzhong as used in taijiquan is more of a noun phrase. Zhong can also refer to pressure, including pressure sensed from an opponent. The classic document in which shuangzhong appears uses the character zhong elsewhere as “weight” or “pressure”: “When the left feels weight (zhong), then the left empties. When the right feels weight, then the right is gone.” Moreover, the balance scale imagery immediately preceding the usage of shuangzhong pretty clearly contextualizes it."
It is the lack of double weighting of the legs that allows emptying the other side from the weighted leg so as to avoid the incoming force. So as to avoid resistance.
There is a two fold meaning of shuagzhong involved-weight and pressure.
The sides can't empty without the opposite side leg being filled.
To avoid double weighting (pressure) quickly, easily, avoid double weighting(weight supported by legs).
The Ying yang symbol, as PS reminded us, clearly distinguishes yin and yang.
The legs should be as clearly distinguished with respect to weight bearing as the fishes in the circle are to colour--as clear as night and day. And not as unclear as dusk or dawn.
In the I ching, using lines, it would be Greater Yang next to Greater Yin, instead of lesser Yang or next to lesser yin.
Two solids lines above each other next to two broken lines above each other.
In ideograph form it would be the ideograph equivalent of xu xu, shi shi.
Reduplication is an intensive formulation to indicate extremes. ALL YANG(re weight of body supported by one leg) next to ALL YIN(re weight of body NOT supported by one leg).
Once it is understood that to avoid being double weighted is to be single weighted, the meaning of single weighted should not be problematic. It's the positive complement to the proscription-logically and physically equivalent.
The issue of the Wu style 100/0 front foot weighting is a separate issue since that configuration does not allow for quick neutralizing in ALL directions. That weighting may have some purpose, but it is problematic since it goes contrary to another important injunction of 'not leaning'.
Not leaning is very important to turning with the least effort and the avoidance of loss of balance. But that's for another time.
Best,
Ron
[This message has been edited by RonKreshmar (edited 05-28-2003).]
[This message has been edited by RonKreshmar (edited 05-28-2003).]
