[laeri]

What kind of structures did you develop that you can't get by weightlifting? I assume these are some kind of stabilizers that you train by some tai chi movements. If this is the case then it should also be possible to train these using a weightlifting regime with some specific movements targeting those stabilizers.

[hosh]

Not stabilizers. It’s a consequence of developing the capability to inflate and expand the muscles instead of movement through contraction. At some level of development, there are ridges that develop that are not conforming to muscle bundles that form from resistance training. Since weight lifting uses only contraction of muscles, it is impossible to develop these ridges I am talking about.

There are a lot of weird capabilities that can come out of it, but those ridges are probably the most obvious effect, yet it is among least documented yet observable effect when you go searching for things about tai chi or yijinjing.