First State
Even for non-cultivators, when their muscles were put under enough stress like shock therapy, for example, they could contract with such force and power that breaking a few bones here and there was completely normal.
So for someone like Hao Xuan whose body had been reconstructed from the ground up and had enough power to go against most beasts around his realm barehanded, the result was a constant struggle between his muscles and his bones to see who would break first.
The muscles expanded and contracted repeatedly, each time more powerful than the last, sending mini shockwaves throughout his internal systems. The bones bent and squeaked trying to hold on and fight against the overwhelming pressure being exuded by the other organs.
Hao Xuan felt like he was about to burst open. He thought after all the times he had done something like this, the pain wouldn't be so strong but once again he was proven wrong.