Okay, relaxing the muscles in your belly to take a hit does not disperse the power of the blow, it just allows the blow to directly crush the internal organs and then you die.
Julius appears to have the upper hand in terms of being able to take the initiative in attacking, but Toa can take the hits and counter. Now Julius has started the fights by blodly declaring his muscles were so much better he could overcome any technique. That said, Julius isn't without any technique, he has deep knowledge on muscles so I assume he's going to get back up and keep attacking, but in a way that may actually take down Toa. We'll just have to see.
Is the Purgatory guy in the basement also a fighter? I guess from the treatment he's getting he's Purgatory's ace.