It seems to me that there is a tendency to use strength/speed before shifting weight, or putting weight into motion/ direction. Using strength without first orienting and directing ones weight towards the point of action seems to cause one to exert with limited power and effect. I find when i've placed my weight on my opponent they are often barely externally effected, but then, when I use my strength while my weight is secretly on them, they are moved around with little effort. it seems that this may be the movement of Qi before Li: the placing of ones weight secretly on the opponent before exerting any strength on them. In striking this seems to manifest in the way that a loose, full body motion, when accelerated and strengthened at the last moment, allows for ones weight to arrive in the strike. It seems very important to be able to distinguish between the transfer of weight and the use of strength, as they must exist simultaneously but layered with proper priority.
https://www.youtube.com/watch?v=XuW4UfaC-l8&t=920s
This interview seems to demonstrate the ability I'm speaking of.
Is this essentially what internal martial arts is about?