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Ignore Pain 04: Isolation Exercises
The more things you try, the more you'll see how everything overlaps and can be used to make what you do better. So is how it is with dance and weightlifting. Crossing workout streams is not only doable but beneficial.

I want to briefly note that isolation does mean keeping other body parts still but 

not

 immobile. This is especially true of the rib cage and core. The two are connected, and you'll notice in the video that when one moves, they both move. When you do it yourself, though, you'll quickly feel a difference.