In my opinion:
1. It's way too dark and the shadows make him look skinny. I also see a little posterization in the shadows.
2. Like MLeek said, the light is too harsh. His pose is pretty cool but his face shows mourning. I think this would have been better if closer to the back wall, and if the fighter filled the frame a little more. Not digging the unfinished look of the wall.
3. Too many things that don't add up. It looks like a fighter in a auto garage with the huge fan and garage door. Out of place to me. Not sure if I dig the angle either.
4. The broom has to go, along with the other objects in the background. Those are eye sores. He's not in focus either which is bad. Again, the subject isn't giving much with his facial expression.
5. Best of the set - Focus looks good, expression gives something more than "...", I like the pose, but what I don't like is the background,the yellow floor, and the lens flare.His finger is also hidden by the tread of the tire.
I didn't post all, maybe I should. There are specific workouts to the sport much like cross fit that my talent did with the tire.
In this post, I was trying to put a short story together using it. Maybe I need to post the photos of him working with the tire to make more sense.
I'd like to see more because the set looks like it was just about to get good. I think capturing the use of the tire in a workout would be a better story telling image.