I don't like the guy with no skin, it's ugly, weird, bland.. the whole thing is bland in fact. But if you like it great. I would go with 1 because when the guy is on the right it looks like he's pulling something, and it looks like hard work. On the left he looks like he's sprinting.
Very odd name btw, what is it? A gym/physiotherapy sort of hybrid?
Chiropractic/physical therapy clinic