Just had a quick thought: is an inflated balloon a clash of forces? Is that even an apt analogy?
You can certainly have a "clash" of forces within ones self. For example pushing with the shoulder dillutes any power generated below it, as pushing with the shoulder pushes back into ones self and negates some of the power generated elsewhere.
I'm not so sure this applies to the balloon model, as local muscle usage is reduced, thus the "dillution" discussed above does not happen to the same degree.