I don't believe any other MA system has used this approach. The moment that you have developed this habit, it's very difficult to remove it later.
One day I worked out in the gym, I was using my whole body to pull the weight pulley (as showing in the 1st picture). One body builder instructor walked toward me and told me that I did it all wrong. He told me that I should "isolating my arms" by freezing my body and just use my arms to pull the weight (as showing in the 2nd picture). When I mentioned the term "body unification", he didn't understand what I was talking about. In his mind, "muscle group isolation" is the only thing that he understood.
IMO, the "outer 3 harmonies" should be addressed in the early training stage.
The
- hand should coordinate with foot,
- elbow should coordinate with knee,
- shoulder should coordinate with hip.
When one starts to move, the other should start to move. When one stops, the other should stop at the same time.