Here's the photo of the person I want in the center of the design:
Background should be removed, and replaced with something else.
There are not weight plates in the picture, but you can add that in if you think it looks better.
This be screen printed on a black shirt.
Should look cool, but appeal to an older crowd, and have a vintage/grungy/"worn out but stood the test of time" feel.
Font should be a retro/vintage/manly looking.
Main color should be white. You can use additional colors (max 2-4) if it suits the design.
An example of a shirt with someone lifting is provided.