DWTD🐕: taiji and internal arts body movement

 Ideally should move with the whole body.

What happens in practice, beginners learn by looking at what the hands and arms are doing, 

and imitate that first,  

and then dragging the rest of the body along with the hands.

Tail wagging the Dog.

It takes years, even decades for energy channels to open up, 

for one's whole body sensitivity to reach the point where one can directly can clearly see 

what body parts is leading what, and whether the whole body moves together in perfect unison.

For beginner and intermediates, if you're going to err better for the hands and arms to lag the torso and legs (tail moved by dog, lags the dog).