.......
The second shot needs some cleanup on aisle #3..... PP on removing the background support post and extend the blackness to the edge of the frame.....
Mea culpa!

I do have versions with a defined background. As for #2, can I ask what you don't like about the brighter area? I deliberately left that in after seeing it because I thought it provided some context to the image.
Okay, so I looked at the
slightly larger version again, with my glasses on this time and then again after cleaning them. At first glance it did look like a background support post on the left side of the frame, but now I see it is part of the gym's wall. It still has a well defined sharp shadow on the wall for whatever that thing is. I guess that's what drew my eye. Perhaps accentuate that feature a bit more.
Also on the second look, there is something else to be cognizant about. Look at his arms in the overhead position. Notice anything odd? His right arm is clearly that of a dedicated athlete, but his left looks more like that 90lb weakling that has sand kicked in his face. A well positioned reflector for that arm to help contour with added light might be worth a go.