I like your composition a lot. Your colors blend well and tones are even. The trophy cabinet tells the story of times past which gives this photo meaning. 8
Nice idea, colors, good lighting on tropy case. Crop out more of wall on right and maybe floor on bottom to give more pixels for the trophy case. Take bulletin off of door temporarily and clutter off of floor. I think that you found a story in a tough challenge.
This image really grew on me the longer I viewed it (and viewing it again to comment). I've bumped it up from my original rating. It's hard to make a gym visually interesting but you've done it here. What particularly gets me here is the story your image tells. I like that the exit doors frame the trophy case and how even the seats (and railing) lead your eye to the doorway. Excellent composition.
A decent try on a tough challenge. While clearly meeting the challenge and competently executed, there's not much in this shot to capture my attention. I understand that the lighting was out of your control, but the foreground comes off a bit muddy, which lessens the impact for me.