When performing Yang Family Taijiquan, one of the first things that is offputting is the pivoting of the foot in Single Whip Posture. The following example shows me explaining a little bit more about how the pivots are useful and why they are there. One of the 10 essential principles of Yang Chengfu is “upper and lower body in coordination”. Moving the arm without consideration of the leg is an error. Moving the leg and arm together creates an alignment and a support structure from a mechanical level. It also changes my intention away from moving my arm to moving from my Kua This makes the genesis of my force distal to the connection point of my Opponent. It is extremely difficult for him to contend with this force as it is coming from somewhere that he cannot quite feel. The structural alignments also support the internal. Breaking your structure is breaking the vessel and spilling the energy.