I'm thinking more along the lines of Kelley Jones musculature since he always draws him with a more lean shape that always seems to float around people.
This just dawned on me, but Kelley Jones is even worse for making Batman hugely muscled. I fucking hated his art.
What is so lean about him in these pics? This is exactly what I hated about Jones, his distorted, inhuman figures he used to draw. The guy was inconsistant. He would draw Bats as this huge distorted monster, then once he wrapped the cape around him, he would become thinner than a pencil.